Our People

CHRISTOPHER E. WALLGREN

Principal

Christopher Wallgren is a transportation operations expert, leading multidisciplinary teams in conducting comprehensive reviews of operations, maintenance, safety, and security & emergency management, and developing management plans for these areas.

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STEPHEN H. FRAZIER

Principal

Steve’s background and expertise is rail and bus safety and security, specializing in state and federal regulation oversight, operational safety, roadway worker protection, and security and emergency preparedness.

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ROBERT J. KOGAN

Principal

Robert Kogan has extensive experience guiding clients through a variety of technical consulting projects in transit safety, security, operations, and maintenance. He leads and implements focused and effective safety and security program activities.

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DANIEL T. HAUBER

Principal

Daniel Hauber specializes in transport safety, operations, and maintenance consulting projects. He focuses on procedures, planning, audits, and business process and maintenance condition assessments. He is proud to work with TRA's amazing team.

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TIM ADAMS

Project Analyst

Tim Adams supports various state safety oversight functions for several clients, including data analysis, inspections. field reviews, system audits, and incident/hazard analysis. Tim has a background in municipal planning and multimodal connectivity.

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ELISE BROSNAN

Senior Analyst

Elise Brosnan supports both state safety oversight and rail transit agencies, ensuring compliance with state and federal requirements and providing organizational and safety data analytics and visualization.

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AALIYAH BROWN

Project Engineer

Ms. Brown joined TRA after spending 13 years in manufacturing and industrial automation. She uses her industrial engineering and quality background to help transit agencies, including with safety management systems and risk-based inspections.

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RICK BUMBERA

Senior Director, Security & Safety

Joining TRA in 2020, Captain Bumbera has over 30 years of security experience and specializes in State Safety Oversight for security and emergency preparedness.

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RONALD ESTER

Senior Director

Ronald Ester has over 30 years of executive leadership experience in the transit industry, specializing in operations, control center management, and safety. Ron supports auditing, inspections, and oversight activities.

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EMMA FORBES

Project Analyst

Emma, a former researcher of bio-inspired engineering, works with transit agencies on corrective actions, safety promotion, and continuous improvement. She assists safety agencies with field reviews, inspections, and instructional material design.

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DEVAN GOURDINE

Senior Consultant

As a transportation industry veteran, Mr. Gourdine has experience in transit investigation, Safety Management Systems, and emergency preparedness via protocols that identify systemic or organizational deficiencies and develop corrective action.

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MARK JANSEN

Senior Analyst

Mark Jansen brings international expertise in transportation management and operations. He works with clients across multiple states, developing relationships to improve internal processes, agency safety plans and state safety oversight reporting.

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JASON KANTNER

Project Analyst

Jason joined TRA as a Project Analyst in 2024, where he supports security and emergency management related projects. His background is as a public safety analyst, where he honed his skills in data analysis, grant writing, and intelligence gathering.

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LAURI KOCHIS

Project Analyst

With an MS in city and regional planning and a writing and community development background to TRA, Lauri supports state safety oversight and rail transit agencies with accident investigations, audits, corrective actions, and safety plan compliance.

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SAMUEL S. KORACH

Project Manager

Samuel Korach manages transit safety and security oversight support throughout the State of Florida. Sam leads multi-disciplinary teams through internal and external audits, special assessments, regulatory inspections, and operational analyses.

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CHRISTOPHER A. KOZUB

Senior Director

Christopher Kozub manages state safety oversight programs and serves as a subject matter expert on transportation operations, fire/life-safety, and security issues, with over 30 years of experience in safety, emergency response, and training.

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ERIK LARSON

Senior Consultant

Erik Larson supports TRA’s safety management, rail and bus transit operations and maintenance program, emergency management, training development and delivery, safety audits, and oversight programs.

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DYLAN LAWSON

Project Analyst

Dylan has a background in chemical engineering and sustainability which he applies to oversight of mostly Pennsylvanian transit agencies. Working as a project analyst, he supports the team to ensure ongoing safe operations.

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CHARLES LINDROOTH

Project Manager

Charles has expertise in rail system safety, regulatory compliance, and operations. He has coordinated on-site audits and works with our clients to lead the review of accident reports, agency safety documents, and corrective action documentation.

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OLIVIA MARCUS

Project Analyst

Olivia Marcus supports numerous state safety oversight projects. She works to ensure that rail transit agencies comply with federal and state legislation through data analysis, on-site reviews, and assisting in audits.

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WILLIAM J. MATTHEWS

Senior Consultant

William Matthews provides expertise to state safety oversight programs and transit agencies, conducting reviews of transit operational and maintenance safety, safety and security certification assessments, and regulatory compliance audits.

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PAMELA MCCOMBE

Senior Director Engineering and Safety

Pamela McCombe brings over 35 years of experience to TRA managing a variety of complex bus and rail projects while achieving the highest degree of technical excellence that addresses the client’s needs.

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ANTOINETTE MEANS

Office Manager

Antoinette Means manages the TRA headquarters office, coordinating internal administrative processes and office operations.

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BRIAN MOLLOT

Technical Consultant

Brian Mollot develops pragmatic solutions related to transit operations and maintenance. Brian focuses on managing safety event investigations and identifying root causes to prevent reoccurrence of hazardous conditions through detailed mitigations.

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DEVON NEALER

Project Analyst

Devon has an M.S. in urban and regional planning and a background in environmental, health, and safety. She assists state safety oversight agencies with corrective actions, risk-based and compliance inspections, and on-site audits.

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PATTY PAXSON

Contracts Administrator

Patty Paxson leads internal business processes, including contract management, finance, insurance, and project coordination. She ensures organizational effectiveness, efficiency, and safety through the implementation of proven workflow procedures.

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SCOTT POULTON

Senior Director, Security and Emergency Management

LTC Scott Poulton is a Certified Emergency Manager specializing in security and emergency management projects. With over 26 years of experience, he provides expertise in planning, response capability development, ICS training, and exercises.

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BON PROVENZANO, P.E.

Director, Systems Safety Engineering

Bon Provenzano supports clients with expertise in signaling, communications, and train control systems. He has extensive Quality and Systems Assurance experience in rail project delivery, transit operations and maintenance, and Systems Safety.

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GREGORY N. ROBINSON

Senior Consultant

Gregory joins TRA with over 40 years of experience - over 30 in rail & APM operations and in aerospace engineering. With expertise in control center operations, rules, and procedures development, he supports safety audits and investigations.

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GEORGE R. SABOL

Executive Director, Security and Emergency Preparedness

Joining TRA in 2012, Major Sabol brings nearly 40 years of experience in the security and emergency preparedness field. He specializes in threat and risk assessments for clients in the transportation, maritime, aviation and petrochemical industries.

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KATHLEEN SEESE

Senior Analyst

Kathleen Seese supports numerous state safety oversight projects. Her work includes ensuring agency compliance with state and federal requirements, investigating events, tracking training requirements, and reviewing safety plans.

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JOSHU SHIH

Senior Project Manager

Joshu Shih has expertise in transit operations, safety, and security, working with government and public transportation agencies on operations, rule compliance, and training; accident/incident investigation; and corrective action plan support.

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NIA SIMMONDS

Quality Process Engineer

Nia Simmonds is a Project Analyst who brings an engineering background to TRA's state safety oversight and operations and management projects, including PennDOT and the City of Cincinnati.

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MAX SMITH

Senior Consultant

Max Smith helps agencies implement safety oversight, plans, and programs. Experience includes driving state safety oversight agency growth and development, audits, inspections, safety certification oversight, and corrective action plan oversight.

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AMELIJA SORG-TAYLOR

Senior Project Manager

Amelija specializes in regulatory oversight of rail agencies which includes operations, maintenance, training, security, emergency preparedness, and safety certification. She currently assists numerous SSOA and agency clients.

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IAN THOMAS

Project Analyst

Ian Thomas is a Project Analyst with a background in architectural design and construction management who focuses on leveraging prior experiences towards rail transit oversight in support of protecting the health, safety, and welfare of the public.

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CHRISTOPHER TIRRI

Project Analyst

Chris holds an M.S. in urban and regional planning and has 10 years of writing education experience. As a project analyst, Chris assists clients with conducting triennial audits, reviewing accident reports and PTASPs, and developing RBI programs.

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CHIARE VERNON

Senior Consultant

Chiare Vernon leverages her expertise in transit security, safety, operations, and maintenance to provide technical, programmatic, and analytic input. She assists in state safety oversight program management of rail transit agencies.

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JOHN WEISGERBER, P.E.

Senior Director, Engineering

John Weisgerber is a licensed engineer with extensive experience in rail, including inspecting and testing transit infrastructure. He provides technical expertise for state safety oversight programs, including audits of vehicle maintenance programs.

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ZOE YOO

Project Analyst

Zoe is a transportation planning professional with a master's degree in city planning. She assists state safety oversight agencies with corrective actions, risk-based inspections, compliance reviews, and on-site audits to improve transit safety.

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JAMES S. YOUNG

Senior Project Manager

James Young helps transit agencies and state governments implement and improve safety plans and procedures, rule compliance audits, and accident investigations. He manages the execution of safety reviews for new systems prior to and during operation.

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TOM MAGUIRE

Project Analyst

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BRANDON WHEELER

Technical Consultant

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