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United States Department of Transportation United States Department of Transportation

Staff - Environmental Measurement and Modeling

Christopher J. Roof

Chris RoofChief of Environmental Measurement and Modeling
BS Interdisciplinary Electrical Engineering and Music, Boston University College of Engineering
Phone: 617-494-6344

As chief of the Environmental Measurement and Modeling Division, Christopher Roof has supported numerous transportation-related acoustics and air quality projects. His two-plus decades of technical experience include measurement, modeling, and analysis of noise, fuel burn, and emissions for all modes of transportation.

Roof provides technical support to the Federal Aviation Administration's (FAA) Office of Environment and Energy (AEE). Roof has helped lead the development of aviation environmental models, including the Aviation Environmental Design Tool (AEDT), a model that enables analysis of noise, fuel burn, and emissions interdependencies at multiple levels. Roof also helps the FAA coordinate research efforts, including those that support environmental tools. He has partnered with NASA conducting measurement programs designed to develop and improve algorithms, as well as add new aircraft to model databases. Roof undertakes technical analyses for the Society of Automotive Engineers (SAE) Aircraft Noise Committee (A-21) and the National Academy of Sciences, and supports both the FAA and National Parks Service (NPS) related to aircraft overflights of national parks.

Roof has provided environmental support in a number of other areas, including investigations of potential impacts of hovercraft noise on humans and wildlife for the United States Postal Service (USPS); the Federal Railroad Administration's (FRA) National Magnetic Levitation Transportation Technology Deployment Program; the Federal Highway Administration's Traffic Noise Model (TNM); a Federal Motor Carrier Safety Administration (FMCSA) analysis of potential noise impacts of increased safety inspections; a Department of Energy (DOE) analysis of electrical transmission lines; and the Federal Interagency Committee on Aviation Noise (FICAN) assessment of noise modeling tools in national parks.

The team Roof leads supports the implementation of advanced vehicle technologies for FAA, NASA, and private industry; undertakes cutting-edge research on behalf of the National Academy of Sciences; fields models that are used around the world; and works with diverse interdisciplinary groups within the Volpe Center to seek innovative solutions to the nation’s transportation system challenges. He is active with multiple committees of the Transportation Research Board.

View Christopher Roof’s LinkedIn profile.

Sathya N. Balasubramanian

Principal Software Engineer
Graduate Certificate in Administration and Management, Harvard University
BS Electronics and Communication Engineering, Bharathiar University, India
Phone: 617-494-6347

Sathya Balasubramanian is a principal software engineer under the Volpe Center Transportation Information Project Support (V-TRIPS) contract in the Environmental Measurement and Modeling Division’s analysis group. His work primarily centers on FAA support to the International Aviation Civil Organization (ICAO) Committee for Aviation Environmental Protection (CAEP).

Balasubramanian has also worked as the lead software developer for the Federal Aviation Administration's (FAA) System for Assessing Aviation’s Global Emissions (SAGE) and as a lead developer for the Aviation Environmental Design Tool (AEDT).

Balasubramanian is a member of ICAO CAEP Modeling and Databases (MDG) and Forecasting and Economics Support (FESG) working groups. As part of these groups, he leads policy analyses for ICAO CAEP using the FAA’s Aviation Portfolio Management Tool Economics (APMT-E) and AEDT. He also acts as the database and system administrator for all major analyses performed using APMT Economics and AEDT.

Before joining the Volpe Center, Balasubramanian worked for several years as lead developer in the field of systems integration and distributed applications. His background also includes specialized knowledge in both Microsoft and Sun Microsystem's distributed application technologies and Microsoft SQL Server.

View Sathya Balasubramanian’s LinkedIn profile.

Michael Barzach

Michael BarzachGeneral Engineer
BSE Acoustical Engineering and Music, University of Hartford

Michael Barzach graduated with a degree in acoustical engineering and music from the University of Hartford (Hartford, CT). This degree combined engineering expertise with training in aural skills to provide an understanding of the real-world applications of acoustics. While at the University of Hartford, Barzach served as the vice president and then president of his collegiate chapter of the Acoustical Society of America. Before joining the U.S. DOT Volpe Center, he also worked as an acoustical intern in architectural acoustical consulting with Longman Lindsey. Barzach joined the Environmental Measurement and Modeling team as a Pathways Intern in 2020 and became full time in 2021. Since joining the Center, he has contributed to the development of FHWA’s Traffic Noise Model (TNM) and the FAA’s Aviation Environmental Design Tool (AEDT). Barzarch is also a member of the Unconventional Aircraft Noise Research Team and has contributed to many other interdisciplinary projects across the Division.

Eric R. Boeker

Portrait of Eric BoekerPhysical Scientist
MS Acoustics, The Pennsylvania State University
BS Electrical Engineering, Purdue University

BA German, Purdue University
Phone: 617-494-6342

Eric Boeker is a physical scientist with over a decade of experience in noise measurement, modeling and analysis projects for various modes of transportation working in the Center's Acoustics Facility.

Boeker provides technical support to the Federal Aviation Administration's (FAA) Office of Environment and Energy (AEE) as team leader for the Integrated Noise Model (INM). He is also part of the Aviation Environmental Design Tool (AEDT) development team focusing on the integration of noise data and modeling capabilities into the AEDT suite. Boeker is involved in several additional FAA, National Park Service (NPS) and NASA projects involving aircraft noise measurement, algorithm development, modeling and analysis.

In support of FAA AEE, Boeker serves as secretary and undertakes technical analyses for the Society of Automotive Engineers (SAE) “Aircraft Noise Measurement and Aircraft Noise/Aviation Emission Modeling” committee (A-21). Boeker also participates in the International Aviation Civil Organization (ICAO) Committee for Aviation Environmental Protection (CAEP) Modeling and Databases (MDG) working group. He is also a technical advisor to the Partnership of Air Transportation Noise and Emissions Reduction (PARTNER) Center of Excellence.

Boeker provides noise-related support to other transportation agencies, including the Federal Railroad Administration and Federal Highway Administration.

Boeker's graduate research involved acoustical signal processing of active sonar. He is actively involved in the Institute of Noise Control Engineers (INCE), the Acoustical Society of America (ASA), and the American Helicopter Society (AHS).

William (Billy) Chupp

Engineer
MEng in Mechanical Engineering, Tufts University
BS in Mechanical Engineering, Tufts University
Phone: 617-494-2139

Billy Chupp joined the Environmental Measurement and Modeling Division in 2016. His specialties include data analysis, python and SQL scripting, cloud software development, and research and technical writing.

Chupp supports a range of noise, air quality, and data analysis projects. He has been involved in HUD’s noise research program and has supported FHWA’s Office of the Human Environment on noise-related research topics in his tenure at the Volpe Center. He has also performed technical research in support of FRA’s noise regulation revisions. Chupp is also a key member FHWA’s CMAQ support team, specifically as a developer of CMAQ toolkit tools, which help organizations estimate emissions benefits from transportation-related projects in a simplified way. Chupp has presented research on noise and co-authored an NCHRP 25-25 research project report in his time at the Volpe Center.

In addition to environmental work, Chupp acts as a member of the Secure Data Commons Product Owner team, and has direct experience developing cloud software to this purpose. His involvement with ITS JPO-related projects includes serving as a data analyst in support of the Connected Vehicle Pilot Projects independent safety evaluation through the Advance Vehicle Technologies Division.

Chupp holds both Master’s and Bachelor’s degrees in mechanical engineering through Tufts University. At Tufts, Chupp gained the analytical expertise and creative thinking skills needed to solve the diverse range of problems the Environmental Measurement and Modeling Division tackles.

Jordan Cumper

Portrait of Jordan CumperAerospace Engineer
BS Aerospace Engineering, Boston University
Phone: 617-494-2761

Jordan Cumper has three years of experience as an analyst in the Environmental Measurement and Modeling Division.

Cumper’s work, supporting the Federal Aviation Administration's (FAA) Office of Environment and Energy (AEE), has included utilizing and testing the Aviation Environmental Design Tool (AEDT) for fuel burn, emissions, and noise related analyses, a carbon footprint assessment of U.S. Department of Transportation employee travel using an AEDT emissions inventory, utilizing Airport Surface Detection Equipment, Model-X (ASDE-X) data for fuel burn studies within airport terminal areas for System Safety Management Transformation (SSMT) and investigating potential fuel burn savings in Gulf Coast helicopter flights utilizing Automatic Dependent Surveillance-Broadcast (ADS-B) navigation systems. Jordan has also participated in field work for Federal Motor Carrier Safety Administration (FMCSA) and Air Tour Management Plan (ATMP) related measurement trips.

Cumper is currently working on AEDT database and modeling related tasks in support of Goals and Targets and the Committee on Aviation Environmental Protection (CAEP). He is also involved in integrating Performance Data Analysis and Reporting System (PDARS) data into modeling software currently being developed at the Volpe Center.

Chris Cutler

Portrait of Chris CutlerPhysical Scientist
BSE Acoustical Engineering and Music, University of Hartford

Chris Cutler joined the Environmental Measurement and Modeling Division in 2014 through the Pathways internship program, and was converted to a full-time physical scientist after receiving his BSE in acoustical engineering and music from the University of Hartford in 2015.

Cutler offers a wide range of support in acoustics-related testing and analysis. He performed extensive software testing and validation for both AEDT 2b and SuperFAR 5.0 releases in support of FAA AEE, and is the technical support contact for FHWA’s Traffic Noise Model (TNM) 2.5. Through the use of SuperFAR and other Volpe Center tools, he supports his division’s role as auditor of Part 36 Aircraft Noise Certifications, including DGPS system validation.

Cutler is the in-house small unmanned aerial systems (sUAS) pilot for his division, having flown multiple test flights used to evaluate hardware and collect high-quality GPS tracking data for the eventual purpose of UAS noise certification. He has experience in various acoustic and meteorological data collection system deployments, including ground-plane microphone setups and long-term environmental surveys.

Cutler has traveled internationally in support of a joint FAA-EASA helicopter noise measurement campaign, deploying multiple acoustic measurement systems and simultaneously collecting acoustic data from helicopters to be used for model validation and refinement. As a part of the NASA-sponsored Waveforms and Sonic boom Perception and Response (WSPR) team project, he developed a strategic set of U.S. test locations and communities for future dose-response testing of “low-boom” supersonic flights.

Robert Downs

Portrait of Robert DownsAerospace Engineer
PhD Aerospace Engineering, Texas A&M University
MS Aerospace Engineering, Case Western Reserve University
BS Mechanical Engineering, Case Western Reserve University
Phone: 617-494-2202

Dr. Robert Downs joined the Environmental Measurement and Modeling Division in 2016. His graduate studies and subsequent research in academia focused on fluid mechanics, with an emphasis on boundary-layer physics. This research comprised, in part, wind tunnel and flight experiments aimed at measurement and manipulation of laminar-to-turbulent transition to improve aircraft efficiency by reducing skin-friction drag. 

Dr. Downs’ specialties and research interests include boundary-layer stability and transition; experimental methods of fluid dynamics measurement; flow visualization; signal processing and data analysis; and fabrication and configuration of experimental apparatuses. 

As part of the Aviation Environmental Design Tool (AEDT) development team, Dr. Downs contributes to ongoing aircraft noise measurements as well as post-processing and analysis of the resulting data. He is part of the group tasked with implementation of updated aircraft performance models to AEDT, and is contributing to setup and configuration of noise measurement data acquisition systems.

Dr. Downs is a member of the American Institute of Aeronautics and Astronautics (AIAA), and has co-authored various works published in the AIAA Journal, Journal of Fluid Mechanics, Experiments in Fluids, and the Journal of Spacecraft and Rockets. He has also served as an expert reviewer for a number of scientific journals and is a frequent presenter at professional and scientific conferences.

Andrew C. Eilbert

Portrait of Andrew EilbertEmissions Modeling Analyst
MS Natural Resources and Environment, University of Michigan
BS Physics, Brandeis University
Phone: 617-494-3543

Andrew Eilbert came to the Center in 2016 as an on-site contractor and analyst with Stinger Ghaffarian Technologies and transitioned to the role of physical scientist with the Environmental Measurement and Modeling Division in 2017. Eilbert primarily provides emissions modeling and data analytics support to the Federal Highway Administration, the Federal Aviation Administration, and the Intelligent Transportation Systems Joint Program Office. He is one of the lead developers for the FHWA’s Congestion Mitigation and Air Quality (CMAQ) Program Toolkit and JPO’s Automated Vehicle Benefits Framework. He has also extensively tested new features to model non-volatile particulate matter in the FAA’s Aviation Environmental Design Tool.

Prior to his position at Volpe Center, Eilbert spent four years as a research fellow on the Motor Vehicle Emission Simulator (MOVES) development team at the U.S. Environmental Protection Agency’s Office of Transportation and Air Quality. At EPA, Eilbert led national fleet and activity updates for MOVES2014. In addition to MOVES development, he played a critical role in quantifying emission inventories for regulations of heavy-duty vehicles.

Eilbert is an active participant in the Transportation Research Board’s Transportation and Air Quality Committee (ADC20) and a young professional member of the Air & Waste Management Association. He regularly presents his work at industry conferences and his research on vehicle emissions and energy efficiency has been cited in journal articles and other publications.

Paul J. Gerbi

Software Engineer
MS Information Technology, Bentley University
BS Electrical Engineering, University of Lowell
Phone: 617-494-3460

Paul Gerbi, a contractor with Computer Sciences Corp. (CSC), works in the Center's Acoustics Facility. Gerbi has over 19 years of experience in computer programming with an emphasis on object-orientated C++ and C# computer programming languages. In support of the Federal Aviation Administration (FAA), he spent many years as a lead designer and developer of the FAA's Integrated Noise Model (INM), Helicopter Noise Model (HNM) and Aviation Environmental Design Tool (AEDT). He has also provided integral support to the development of the Federal Highway Administration’s (FHWA) Traffic Noise Model (TNM). Gerbi has also made numerous programming contributions in support of the Acoustic Facility's extensive field measurements and data analysis.

Vyacheslav (Slava) E. Gorshkov

Senior Programming Analyst
PhD Physics and Mathematics, Moscow State University, Russia
Phone: 617-494-2871

Dr. Vyacheslav Gorshkov is a senior programming analyst at Federal Technical Services, Inc. of the URS Corporation. His focus in supporting the Environmental Measurement and Modeling Division in the software design and development of the various modules of the Aviation Environmental Design Tool (AEDT).

Dr. Gorshkov has over 20 years of research and development experience in the information technology, telecommunication, energy and science industries. His scientific interests include mathematical and computer modeling in the fields of radioecology, x-rays and gamma-rays diffraction, light propagation in disperse media, and theory of stochastic fields. In the information technology field, Dr. Gorshkov has been responsible for research, design, development and implementation of applications in multi-platform and multi-operating system environments.

Dr. Gorshkov’s prior assignments at the Volpe Center included design, development, and maintenance of various applications for the Federal Motor Carrier Safety Administration (FMCSA).

View Vyacheslav Gorshkov’s LinkedIn profile.

Andrew J. Hansen

Portrait of Andrew HansenPrincipal Technical Advisor
PhD Electrical Engineering, Stanford University
Phone: 617-494-6525

Dr. Andrew Hansen joined the Environmental Measurement and Modeling Division in 2005. Dr. Hansen draws on a wide base of knowledge gained over the last 25 years in academia, corporate/industry, and small business ownership settings. He has in-depth and practical experience in computational mathematics and optimization, statistical signal processing, geographic information systems, visual simulation and modeling, and software life-cycle design.

Dr. Hansen’s work is currently focused in two areas, environmental modeling of the aviation enterprise and navigation/position/timing (PNT) systems for U.S. critical infrastructure, particularly airspace navigation. Active programs in the environmental area include responsibility for the Aviation Environmental Design Tool (AEDT) and the Aviation Portfolio Management Tool for Economics (APMT-E). Active programs in the PNT area include civil signal monitoring for GPS (GPS-CSM), flight planning tools for FAA’s NextGen initiatives in Automatic Dependent Surveillance-Broadcast (ADS-B), Wide Area Augmentation System (WAAS), and Receiver Autonomous Integrity Monitoring (RAIM) for Area Navigation/Required Navigation Performance (RNAV/RNP), and international Global Navigation Satellite System (GNSS) monitoring.

Dr. Hansen is a member of the Institute of Electrical and Electronic Engineers (IEEE), the Institute of Navigation (ION), and the Society for Computer Simulation (SCS). He has published regularly in journals and conference proceedings.

Aaron L. Hastings

Physical Scientist
PhD Acoustics, Purdue University
MS Mechanical Engineering, Michigan Technological University
BS Mechanical Engineering, University of Cincinnati
Phone: 617-494-3220

Dr. Aaron Hastings is a physical scientist in the Center's Acoustics Facility. He has 20 years of experience working on sound quality, environmental noise and noise control issues in academia and the automotive and transportation industries. His work has included theoretical and experimental approaches to measuring, modeling and solving acoustic-related problems for the Federal Highway Administration (FHWA), the National Highway Traffic Safety Administration (NHTSA), the Federal Aviation Administration (FAA), and the National Park Service (NPS).

Dr. Hastings’ work at the Volpe Center has included maintenance and development of the FHWA’s Traffic Noise Model (TNM), measurement of highway noise, modeling of pavement-specific Reference Energy Mean Emission Levels (REMELs), measurement of snowmobile and snow coach noise in national parks, modeling of over-snow vehicle noise through the development of a modified version of FAA’s Integrated Noise Model (INM), community annoyance for the FAA, and the development of minimum sound levels for NHTSA’s work related to the Pedestrian Safety Enhancement Act.

Dr. Hastings’ academic research has focused on the development of sound quality metrics for automotive noise and has involved monaural and binaural measurements, acoustic signal processing, system modeling, psychoacoustics, and subjective testing techniques. He has publications in the Noise Control Engineering Journal, International Speech Communication Association Research Workshop, Proceedings of Inter-Noise, and the International Congress of Acoustics and has made numerous presentations at conferences, working groups, and public meetings.

Sunje (Susie) Hwang

Analyst/Programmer
BA Computer Science and Economics, Wellesley College
Phone: 617-494-3110

Sunje (Susie) Hwang joined the Environmental Measurement and Modeling Division as an employee of MacroSys Research and Technology in 2011. She is currently involved in the development of the Aviation Environmental Design Tool (AEDT). Hwang provides technical support to users, performs testing of the software, and develops AEDT documentation, including the user’s guide, technical manual and training materials.

Before joining the Center, Hwang worked as a transportation consultant. At Cambridge Systematics, she played a key role in several aspects of the Pontis Bridge Management System for the American Association of State Highway and Transportation Officials (AASHTO). She was responsible for testing, documentation and user support. She also managed and implemented Pontis projects for several states. The work included implementing and customizing databases, creating custom reports and forms, running Pontis simulation models for bridge needs analysis, and providing operational support.

Sophie R. Kaye

Portrait of Sophie KayeStaff Engineer
BSE Acoustic Engineering and Music, University of Hartford
Phone: 617-494-3394

Sophie Kaye studied at the University of Hartford in a uniquely specialized degree program combining traditional engineering studies with music performance in order to train her aural skills to better understand and serve the needs of her clients.

Since joining the Environmental Measurement and Modeling team in 2019, Kaye supports the International Aviation Civil Organization (ICAO) Committee for Aviation Environmental Protection (CAEP) Modeling and Databases (MDG) working group, and is a member of the Aviation Environmental Design Tool (AEDT) development team.  

Kaye has published and co-authored several papers including with SAE International (previously Society of Automotive Engineers), the Institute of Mechanical Engineers (IMechE), and the International Institute of Noise Control Engineering (I-INCE) including a conference presentation at Inter-Noise.

Prior to joining the Volpe Center, she had previous experience working in noise, vibration, and harshness (NVH) consulting with Brüel & Kjær Global Engineering Services and architectural acoustic consulting with Cerami & Associates.

Yefim Keselman

Computer Scientist
MS Software Engineering, Boston University
BA Mathematics, Kaliningrad University
Phone: 617-494-2407

Yefim Keselman, a contractor, began providing support to the Center as a software developer to work on the Federal Aviation Administration’s (FAA) Enhanced Traffic Management System (ETMS). Keselman was a technical lead on the development of a Traffic Situation Display used by Air Traffic Management specialists to predict traffic surges, gaps and volume based on current and anticipated airborne aircraft. Recently, Keselman began supporting the Environmental Measurement and Modeling Division Traffic Noise Model (TNM) and Aviation Environmental Design Tool (AEDT) projects.

Prior to working at the Volpe Center, Keselman gained valuable experience working at various hi-tech companies. Keselman is a Computer Sciences Corporation (CSC) employee working under the Volpe Transportation Information Project Support (V-TRIPS) contract.

Cynthia S. Y. Lee

Electrical Engineer
BS Electrical Engineering, Northeastern University
Phone: 617-494-6340

Since joining the Center in 1991, Cynthia Lee’s work has covered many aspects of transportation-noise research for the Federal Aviation Administration (FAA), National Park Service (NPS), Federal Rail Administration (FRA), and Federal Highway Administration (FHWA). In support of the FAA and NPS, she is the project manager for acoustical research in support of the Grand Canyon National Parks (GCNP) Overflights Environmental Impact Statement (EIS) and the development of Air Tour Management Plans (ATMPs) where she leads teams that collaborate with experts from the fields of social science, natural resource management, and acoustics in the development of quantitative relationships that correlate aviation noise exposure and visitor responses. Both projects include acoustical data collection to determine ambient sound conditions, computer modeling using the FAA’s Integrated Noise Model (INM) and Aviation Environmental Design Tool (AEDT), and analyses to predict noise impacts from air tours or other sound sources of interest for National Environmental Policy Act documents or other planning documents.

Lee also provides contractor oversight, project management, project review and monitoring, and technical expertise for the FRA’s High Speed Intercity Passenger Rail (HSIPR) Program and Transportation Investment Generating Economic Recovery (TIGER) Program. Other work includes support of the FHWA’s Noise Barrier Design Handbook and Traffic Noise Model (TNM).

Jonathan T. Lee

Portrait of Jonathan LeeSenior Project Lead
PhD Applied Mathematics, Harvard University
Phone: 617-494-2411

Dr. Jonathan Lee joined the U.S. DOT Volpe Center in 2002 as an operations research analyst. He is currently the senior project lead in Air Traffic Control Concepts and Systems. Prior to that, he was the chief of the Aircraft Wakes and Weather Division.

Dr. Lee has worked on projects sponsored by the Federal Aviation Administration (FAA) and the National Aeronautics and Space Administration (NASA). His areas of research include air traffic management (ATM) concepts and systems research and development; human-system integration; National Airspace System (NAS) modeling, simulation, and optimization; and performance evaluation and assessment of the NAS. Some of the projects he has been involved in include FAA Tailored Arrivals, FAA Remote Tower, the NASA NextGen ATM-Airportal, NASA Virtual Airspace Modeling and Simulation, and the NASA Detroit Deicing Decision Support Tool. He holds a patent on modeling deicing process on airport surface.

Dr. Lee holds a PhD and AM in applied mathematics from Harvard University and a BS in mathematics from Rensselaer Polytechnic Institute. His graduate work focused on modeling, simulation, and optimization of complex systems.

John M. MacDonald

Environmental Engineer
PhD Environmental Engineering, University of Central Florida
MS Environmental Engineering, University of Central Florida
BS Electrical Engineering, General Motors Institute

John MacDonald, a contractor under Computer Sciences Corp. (CSC), is an environmental engineer specializing in Transportation Acoustics. MacDonald has been developing custom noise prediction computer models and working as a noise and air quality consultant since 1995.

MacDonald developed the Community Noise Model (CNM) and Railway Noise Model (RWNM) while at the University of Central Florida. In addition, he has developed many custom data analysis programs in various programming languages, develops SQL databases, rewritten several local noise ordinances in his home state of Floria and taught many environmental sound measurement training courses. He also designs custom data acquisition systems and is technically skilled with most air quality, vibration and sound level monitoring/analysis equipment. His field work includes over 50 consulting and research projects since 1995. His work at the Volpe Center includes a Roadway Asbestos study in Sacramento CA, Dispersion Study in Oklahoma City, EDMS validation project at Dulles airport, extensive data collection and analysis for the Air Tour Management Plan (ATMP) project in approximately 25 National Parks, and a multi-year tire/pavement sound intensity study that inventoried pavements throughout Florida.

Prior to joining the Center, MacDonald was as an Electrical Engineer for GM Powertrain from 1985-1994. He has published and presented for the Transportation Research Board (TRB), Air and Waste Management Association (AWMA) and InterNoise.

Vyacheslav Mayorskiy

Principal Software Engineer
MS Computer Science, University of Massachusetts
MS Experimental Nuclear Physics Engineering, Kharkov State University, Ukraine

Vyacheslav Mayorskiy is a principal software engineer at Foliage, a product development company providing a full complement of consulting and engineering services. As a member of the Foliage team, he is involved in the development of Version 2B of the Aviation Environmental Design Tool (AEDT). Mayorskiy is part of the User Experience (UX) scrum team and fulfills the roles of lead and developer. He is also responsible for the overall AEDT user experience - working with stakeholders, collecting their feedback, and translating it into application visual concepts.

Before working at the Volpe Center, Mayorskiy worked as a software engineer and architect in the medical, semiconductor and telecommunication industries using different languages and technologies.

View Vyacheslav Mayorskiy’s LinkedIn profile.

Anjuliee Mittelman

Portrait of Anjuliee MittelmanEnvironmental Protection Specialist
PhD Environmental Engineering, Tufts University
BS Chemical Engineering, Queen’s University
Phone: 617-494-2706

Dr. Mittelman joined the Volpe Center as an environmental protection specialist in 2015 through the Presidential Management Fellowship (PMF) program. She has provided technical and policy support to the Federal Highway Administration (FHWA), Federal Railroad Administration, Federal Aviation Administration, and Environmental Protection Agency (EPA). Dr. Mittelman’s recent work has focused on developing regulations, standards, and guidance on a range of environmental issues including brownfields redevelopment, noise, and greenhouse gas emissions.

Dr. Mittelman provides support to the International Civil Aviation Organization's (ICAO) Committee on Aviation Environmental Protection (CAEP) on analysis of aviation-related emissions. She supports the EPA’s Upstream Tool, which models transportation-related emissions across the entire fuel lifecycle (well/crop to tailpipe). Dr. Mittelman also works to develop tools for FHWA’s Congestion Mitigation and Air Quality Improvement (CMAQ) program to assess the emission benefits of alternative fuel vehicles.

Dr. Mittelman contributes to several FHWA programs aimed at streamlining environmental review and permitting processes under the National Environmental Policy Act (NEPA), Clean Water Act, Magnuson Stevens Fisheries Act, and Endangered Species Act. She is the project manager for the Every Day Counts-4 Integrating NEPA and Permitting initiative and the FHWA/National Marine Fisheries Service Programmatic Consultation.

Dr. Mittelman’s graduate research focused on contaminant fate and transport in groundwater and drinking water treatment systems, with an emphasis on the environmental and public health implications of nanotechnology.

Viktor Mykhayliv

Software Engineer
MS Electrical and System Engineer of Automatic Control Systems, Polytechnic University, Lviv, Ukraine
Phone: 617-494-6331

Viktor Mykhayliv joined the Environmental Measurement and Modeling Division as an employee of Computer Sciences Corporation (CSC) in 2009 working under the Volpe Transportation Information Project Support (V-TRIPS) contract.

He started as a Microsoft Reporting technology expert for the development of the Federal Highway Administration’s (FHWA) Traffic Noise Model (TNM). He is also developing a testing system for the Aviation Environmental Design Tool (AEDT) project based on integrating IBM Rational Functional Tester, Microsoft Visual Studio 2010, Microsoft Test Manager 2010, and Team Foundation Server 2010.

Before joining the Volpe Center, Mykhayliv worked in the software design and development industry, specifically, with Assembler, C++, .NET and MS SQL Server environments, covering military aircraft, financial and government sectors in the U.S. and Canada while focusing on all stages of the Software Development Life Cycle from design to deployment.

View Viktor Mykhayliv’s LinkedIn profile.

Bradley L. Nicholas

Brad NicholasGeneral Engineer
MEng Acoustics, Pennsylvania State University
MA Education, The College of William and Mary 
BA Physics, Franklin and Marshall College
Phone: 617-494-3671

Brad Nicholas joined the Environmental Measurement and Modeling Division at Volpe in 2020 following 18 years as a noise and vibration consultant at Harris Miller Miller and Hanson, Inc. and 3 years as a high school physics teacher. Since joining Volpe, he has conducted aviation noise analyses in support of the Federal Aviation Administration (FAA), National Aeronautics and Space Administration (NASA), National Park Service (NPS), and U.S. Fish and Wildlife Service (FWS). These analyses have addressed inputs to the FAA’s Aviation Environmental Design Tool (AEDT), aircraft fleet, noise modeling algorithms, wildlife noise exposure, air tours, helicopters, and urban air mobility modeling.

As a consultant, Nicholas managed 75+ airport noise studies such as 14 CFR Part 150 studies, National Environmental Policy Act (NEPA) environmental assessment noise analyses, airport ground noise studies, helicopter noise assessments, noise measurement programs, environmental reporting projects, and on-call services. He developed curriculum and taught over 40 courses in AEDT, the Integrated Noise Model, and airport noise control practices to airports, consultants, FAA, universities, NASA, and international governmental organizations.

Nicholas designed and executed field data collection protocols for aviation flight and ground noise community measurements, aircraft and ground service equipment directivity and spectrum measurements, soundscape binaural recordings, operator procedures surveys, and community attitudes surveys. He performed analyses including aviation flight noise modeling, aviation ground noise modeling, airline fleet database analyses, noise model validation statistical analyses, representative flight track tool creation, binaural recording processing, and educational outcomes statistical analyses. His work supported a broad range of sponsors including airports, utilities, private companies, the FAA, the Federal Interagency Committee on Aviation Noise, and the Airport Cooperative Research Program.

Amanda S. Rapoza

Acoustics Engineer
BSE Acoustical Engineering, University of Hartford
Phone: 617-494-6339

As a senior member of the Environmental Measurement and Modeling Division at the Volpe Center, Amanda Rapoza serves as technical lead for numerous transportation-related noise projects for the Federal Railroad Administration (FRA), Federal Aviation Administration (FAA), National Park Service (NPS), and Federal Highway Administration (FHWA). 

Her work for FRA has spanned a range of noise-related projects, including a technical evaluation and recommendations for high-speed rail noise emission standards, analysis and evaluation of rail projects for National Environmental Policy Act documents, and technical evaluation of the audibility and warning effectiveness of train horns for both motorists and pedestrians. In addition, she has provided technical expertise in the development of a rail noise module for the National Transportation Noise Map in support of the Bureau of Transportation Statistics.

Over her 30-year career, she has supported NPS and FAA in the development of Air Tour Management Plans. She manages all aspects of National Parks noise modeling using the FAA’s Integrated Noise Model and Aviation Environmental Design Tool to predict noise impacts from air tours or other sound sources of interest. She led measurement and analysis teams in the development of quantitative relationships that correlate aviation noise exposure and park visitor responses.

Additionally, Rapoza supports NPS research into the use of quieter pavements in National Parks, and has provided analytical support for the FHWA Traffic Noise Model.

David Read

Information Technology Specialist
University of Massachusetts
Boston School of Electronic Music
617-494-6343

Dave Read is the lead on the Center's aircraft noise certification support project, which has been continuously funded by the FAA since the late 1970s. Read has been involved in transportation-related noise work since the mid-1980s. His background is in acoustics and recording, studying engineering, physics, and music at UMass Amherst, then electronic music at the Boston School of Electronic Music (BSEM). His previous work experience includes 3 years as an instructor at BSEM and 7 years managing the audio recording department of the New England Conservatory of Music, where he also taught a course in audio recording techniques.

Read’s responsibilities include software design, coding, and maintenance; design, planning, and performance of acoustic measurement campaigns; formal evaluation of acoustical instrumentation, software, and methodologies used by applicants for FAA aircraft noise certifications; and technical writing for national and international transportation noise-related standards, guidelines, and regulations.

He is currently a member of the International Civil Aviation Organization (ICAO) Working Group 1 (WG1) and acts as the WG1 custodian of the ICAO Environmental Technical Manual, Vol. I (ETM). He also leads and participates in several ad hoc task groups for improvement of ICAO’s Annex 16, Vol. I and the ETM. He is the liaison between WG1 and the International Electrotechnical Committee’s MT23 team in development of Version 2 of IEC 61265. Read is a member of the NASA Urban Air Mobility Noise Working Group, and participates in the Ground and Flight Testing subgroup. He is also a member of the Institute for Noise Control Engineering and the Vertical Flight Society.

Read has co-authored articles in the Journal of the Acoustical Society of America and the Noise Control Engineering Journal, and papers presented at Transportation Research Board ADC40 meetings and at Institute of Noise Control Engineering NoiseCons.

View Dave Read’s LinkedIn profile.

Robert W. Samiljan

Portrait of Robert SamiljanSenior Engineer
BA Economics, Vassar College
Phone: 617-494-2272

Robert Samiljan is an on-site contractor with Stinger Ghaffarian Technologies, Inc. (SGT) and has been supporting the Environmental Measurement and Modeling Division since 2004 and the Aviation Weather Research Facility at Joint Base Cape Cod since 2013. With over 20 years of professional experience in acoustics and engineering, Samiljan combines technical expertise, innovation, and a practical solutions-oriented approach to enable new capabilities, solve technical challenges, and enhance numerous environmental measurement and modeling initiatives.

Samiljan’s areas of expertise include design, development, and configuration of data acquisition systems; acoustic measurement; computer noise modeling, specializing in the Federal Aviation Administration (FAA) Aviation Environmental Design Tool and Integrated Noise Model; analysis and validation of acoustic instruments and measurement systems for aircraft noise certification in accordance with FAA and International Civil Aviation Organization standards; GNSS systems design; and aviation weather instrumentation and analysis, including meteorological sensors, enhanced-flight-vision systems, and runway-visual-range systems.

Samiljan has developed measurement systems tailored to unique project demands and traveled extensively in support of field measurements and flight tests. As the primary noise modeler for the Air Tour Management Plan program, he has also developed noise studies for numerous National Parks (NPS/FAA). More recently, Samiljan has been developing unique capabilities to facilitate the measurement and characterization of noise produced by unmanned autonomous systems. In addition, Samiljan oversees both the Acoustics Lab of the Environmental Measurement and Modeling Division and the Center's Aviation Weather Research Facility at Joint Base Cape Cod, where his primary responsibilities include design, configuration and deployment of measurement systems; diagnostics, repair, maintenance, and upgrades of acoustical, meteorological, and visibility instrumentation; preparation of technical documentation; training of field staff; and resource management.

David A. Senzig

Electronics Engineer
MS Mechanical Engineering, University of Washington
BS Aeronautical Engineering, University of California, Davis

Phone: 617-494-3348

David Senzig has over 30 years of experience with aircraft performance and aircraft environmental issues. Senzig has worked for the Boeing Company, HMMH, and his own engineering consulting firm. He has published articles in the Journal of the Acoustical Society of America, the Noise Control Engineering Journal, and the Journal of Aircraft.

Senzig has taught courses on the use of the Federal Aviation Administration’s (FAA) aviation environmental models in France, the Netherlands, Taiwan, and throughout the United States. He has written specialized computer code to translate aircraft performance parameters into model-ready inputs in support of Part 150 studies, Part 161 studies, environmental assessments, and environmental impact studies. Senzig has worked with Airbus, Boeing, Bombardier, Cessna, Embraer, and Gulfstream on aviation environmental issues. He led the effort to develop the terminal area fuel consumption prediction method used in the FAA’s model. He currently leads the division’s UAS working group and is responsible for incorporating high fidelity airplane and helicopter performance models in AEDT.

Senzig is a registered professional engineer in Washington, Maine, and Massachusetts. He is an aircraft owner and instrument-rated private pilot, and holds a remote pilot certificate.

Meghan J. Shumway

Physical Scientist
BSE Acoustical Engineering and Music, University of Hartford and the Hartt School of Music
Phone: 617-494-2969

Meghan J. Ahearn Shumway became a member of the Environmental Measurement and Modeling Division in 2009. She studied at the University of Hartford and the Hartt School of Music in a program designed to integrate the importance of music and hearing development with acoustical engineering.

Shumway provides acoustics research support for a number of agencies and is the team leader for an update to the Federal Transit Administration’s (FTA) Noise and Vibration Impact Assessment Manual. Shumway supports the Federal Aviation Administration (FAA) in development, user documentation, training, and outreach for the Aviation Environmental Design Tool (AEDT). She also supports the verification and validation of aircraft for inclusion in the Integration Noise Model (INM) and AEDT. Ahearn is involved with running and analyzing park studies in INM to develop Air Tour Management Plans (ATMP) in support of the Federal Aviation Administration (FAA) and National Park Service (NPS). Shumway supports the development of minimum sound levels for the National Highway Traffic Safety Administration’s (NHTSA) work related to the Pedestrian Safety Enhancement Act.

Shumway is a member of the Acoustical Society of America (ASA).

Matthew C. Simon

Portrait of Matthew SimonCivil Engineer
PhD Civil and Environmental Engineering, Tufts University
BS Mechanical Engineering, University of Washington
Phone: 617-494-3195

Dr. Matthew Simon joined the Environmental Measurement and Modeling Division in 2019. He comes to the Volpe Center with an extensive background in air quality measurements and modeling. Dr. Simon supports the Federal Aviation Administration and Federal Highway Administration with dispersion model development and application, and supports a variety of other projects involving field measurements of air pollution and noise.

Prior to joining the Volpe Center, Dr. Simon spent a few years in academia researching traffic- and aviation-related ultrafine particles (<100 nanometers diameter) in metropolitan Boston, Massachusetts, and aviation noise exposure nationally. He has published his work in several peer-reviewed scientific journals and has presented at many international conferences. Dr. Simon has also spent time as a contractor supporting the Fuel Cell Technologies Office at the U.S. Department of Energy and taught high school science for two years in rural North Carolina as a Teach For America corps member.

View Matthew Simon's LinkedIn profile.

Gina Barberio Solman

Portrait of Gina SolmanEnvironmental Protection Specialist
MA Energy and Environmental Analysis, Boston University
BA Environmental Analysis and Policy, Boston University
Phone: 617-494-3571

Gina Solman is a senior project manager and environmental protection specialist who has worked at the Volpe Center since 2005. She solves complex problems across all modes of transportation, analyzing policy and building consensus on technical topics of national concern.

Solman specializes in noise policy and facilitates interagency coordination on a range of topics. She leads multidisciplinary teams of engineers, scientists, and planners to serve clients and the public good. Solman conducts research to inform the development of policies, regulation, and guidance in support of the Federal Aviation Administration, Federal Highway Administration, and Federal Railroad Administration to assess transportation-related noise and emissions. This work includes strategic design, qualitative and quantitative analysis, facilitation, and technical writing.

Solman is the secretary on the WTS-Boston Board of Directors, committed to providing networking events and educational programs to transportation professionals.

View Gina Solman’s LinkedIn profile.

Theodore G. Thrasher

Portrait of Theodore ThrasherMS Systems Engineering, Johns Hopkins University
BS Aviation, The Ohio State University College of Engineering
Commercial Pilot

Ted Thrasher joined the Volpe Center in 2016 as a contractor working for DIGITALiBiz. He brings more than 20 years of experience in aviation analysis and modeling to the team, combined with an operational background as a commercial pilot and former flight instructor.

Prior to joining the Center, Thrasher served as chief of the Environmental Standards Section at the International Civil Aviation Organization (ICAO), the United Nations specialized agency responsible for setting global policies, standards, and recommended practices for international aviation. In that role, Thrasher was responsible for all activities related to the setting of international standards and policies for aircraft environmental performance, including noise, emissions, and fuel efficiency. During his tenure, he oversaw the development of two new aircraft emissions standards for CO2 and non-volatile particulate matter and contributed to noise and NOx emissions standards. He was also responsible for the development of ICAO’s guidance material and support tools for the quantification of aviation’s impact on the environment.

Thrasher also previously held the positions of director of Simulation, Modelling, and Analysis and executive director of Investment Strategy and Analysis for the engineering services firm CSSI, Inc. in Washington, D.C. Thrasher holds a bachelor of science degree in aviation from The Ohio State University, a master of science degree in systems engineering from Johns Hopkins University, and a commercial pilot’s license.

Yasunari Tosa

Software Engineer
PhD Theoretical Physics, University of Rochester
617-494-6343

Dr. Yasunari Tosa is a software engineer/principal leader from Computer Sciences Corporation (CSC) working at the Environmental Measurement and Modeling Division. He joined the Volpe Center in March 2010 and is involved in the development of software systems for the Aviation Environmental Design Tool (AEDT). He is currently working on the AEDT 2B scrum-core team. Previously, he worked on the deserialization of TRAFVU binary data, creating a.NET parser for various weather data (NOAA, NASA, etc.) using C++/CLR, a Monte-Carlo aircraft parameter assessment (UQ) program, AEDT studies from ETMS data for turn-around flights using LINQToXML, and graphics layers for receptor sets, contours, emission dispersion map using ArcGISRuntime.

Before joining the Center, he produced a total of 34 papers at Virginia Tech, Los Alamos and University of Colorado. He enjoys learning opportunities, developing new technologies (parallel programming, machine vision, brain imaging, and biometrics), and producing patents (seven patents). He also has contributed to open source projects ImageJ and Jasper.

At a prior company, he was in charge of developing iris biometric software from scratch. The capturing software he created was deployed in Iraq and Afghanistan and was considered more effective than a ten-fingerprint biometric by researchers at a DOD lab. Additionally, he helped develop high performance cluster software systems with web access for iris identification of 6 million federal employees.

Lyle Tripp

Portrait of Lyle TrippTechnical Lead and Task Manager
MS Transportation Engineering, University of California, Berkeley
BS Civil and Environmental Engineering (Systems), Massachusetts Institute of Technology
Phone: 617-494-3632

Lyle Tripp currently works as a technical lead and task manager within the Environmental Measurement and Modeling Division. He is responsible for the study of national environmental and energy performance in support of the Federal Aviation Administration (FAA) and its Environmental Management System, an integral component of the Next Generation Air Traffic System.

Tripp has over seven years of experience in aviation consulting, including four years in environmental and energy strategy.

View Lyle Tripp’s LinkedIn profile.

Andrew J. Wilson, PMP

Principal Software Engineer
BS Computer Science, University of Michigan
Phone: 617-494-3007

Andrew Wilson, a contractor with Computer Science Corp. (CSC), is a principal software engineer in the Environmental Measurement and Modeling Division. Wilson serves as the product manager of AEDT 2A that supports regional environmental analysis of aviation. He also serves as scrum master of the core development team for AEDT 2B, focusing on enhancements to AEDT capabilities and the Operations and Maintenance team supporting users.

Previously, Wilson worked as technical lead and technology advisor on projects for the Federal Motor Carrier Safety Administration (FMCSA) and the Federal Aviation Administration (FAA), utilizing his expertise in Service-Oriented Architecture (SOA), information security, technical leadership, and object- and aspect-oriented software design and development. He was also technical lead and technology architect for the Department of Transportation's (DOT) pilot implementation of the E-Authentication Initiative. Additionally, he was the technical lead for the design and development of web services for exchanging safety information between the FMCSA, its field users and state operated information systems. His work has been recognized by project sponsors at the program management and agency executive levels.

Wilson was the recipient of a CSC Leading Edge Forum research grant under which he completed an extensive report on SOA Security. He presented the results at the CSC Technology and Business Solutions Conference.

Before joining the Volpe Center, Wilson worked on a variety of innovative systems in the areas of service-oriented and distributed computing, virtual reality, massively parallel processing, natural language processing, case-based reasoning, data mining and message classification.

View Andrew Wilson’s LinkedIn profile.

Alexis Zubrow

Physical Scientist
MS Geography, University of Wisconsin at Madison
BA Physics, Harvard University
Phone: 617-494-3857

Alexis Zubrow focuses on the environmental impacts of the aviation and surface transportation modes, with a particular emphasis on emissions. He is the project manager for the Aviation Environmental Design Tool (AEDT) for the FAA. AEDT is a software tool that estimates the environmental impacts of the next generation of aviation systems, modeling a wide range of scenarios including individual flights and airport, regional, national, and global studies.

He leads a team of scientists and software developers to improve the capabilities of AEDT to model aviation fuel consumption, emissions, and noise. He coordinates between FAA, the Volpe Center, and various stakeholders to identify key improvements to AEDT, and develop a vision for future versions of AEDT.

Zubrow is the project manager of the Upstream Tool for the U.S. Environmental Protection Agency (EPA). He leads a team of scientists and software developers redesigning the Upstream Tool to characterize the emissions of well-to-pump emissions for the on-road sector. This project improves data, algorithms, and software tools to more effectively and transparently model the sector.  

He is an expert on emissions and air quality modeling for multiple transportation modes as well as other sectors. Before coming to the Center, he was an emissions modeler for the EPA. There he developed current estimates, future projections, and control scenarios of emissions to support national rules to improve air quality and reduce greenhouse gases.

Staff Directory

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Last updated: Wednesday, September 1, 2021