Meet the Team

Heffron Transportation’s staff of transportation professionals are integrated through a virtual office environment. The firm is managed by Principals Marni Heffron and Tod McBryan. Senior-level project management and engineering excellence are also provided by Associate Principal Jennifer Barnes. All three of these senior staff are professional engineers (PE). Marni Heffron is also a certified professional traffic operations engineers (PTOE).

Co-owned by founder Marni Heffron and Tod McBryan, the firm is certified as a Women-owned Business Enterprise (WBE).

Marni Heffron P.E., P.T.O.E
Principal & President

Marni founded Heffron Transportation, Inc. in 1995 and has provided transportation planning and engineering consulting since 1985. She leads the firm’s strategic and policy planning practice and oversees major transportation studies. Marni works on all types of projects including planning and engineering for development projects, port facilities, freight and intermodal transportation, area-wide transportation plans, and roadway corridors. She assists design teams with determining street configurations, site layouts, pedestrian improvements, parking needs, and transportation management programs. Marni is one of the region’s foremost transportation experts and leads negotiations and mediations for transportation-related disputes.

marni@hefftrans.com

206-523-3939

Tod McBryan P.E.
Principal & Vice President

Tod is a Principal and Vice President of the firm and leads the firm’s practices with transit facilities as well as educational and institutional development. He also manages major urban mixed-use projects and freight transportation planning efforts. He has provided transportation planning and engineering consulting services since 1992 and has served in his current position with Heffron Transportation since 1995. He has managed traffic and parking studies for numerous public and private sector clients throughout Western Washington as well as in Oregon, Alaska, and California. He has extensive experience preparing transportation sections for environmental review documents and has also served as an expert supporting negotiations and mediations for transportation-related disputes.

Tod is a Professional Civil Engineer licensed in Washington State. He holds a Master of Business Administration degree from the University of Washington where he studied global trade, transportation and logistics. He also holds a Bachelor of Science degree in Civil Engineering from the University of Washington where he focused on transportation. Tod is a member of the Institute of Transportation Engineers and the Transportation Research Board.

tod@hefftrans.com

206-527-8410

Jennifer Barnes P.E.
Associate Principal

Jennifer specializes in multimodal transportation planning and policy analysis, with expertise integrating land-use planning and transportation. She frequently manages transportation analysis to support comprehensive and subarea plans, and compliance with the Washington State Growth Management Act. She has extensive experience in preparing transportation sections of environmental documents, and has managed environmental compliance for numerous transportation projects. She has provided transportation planning and engineering services since 1990, and joined Heffron Transportation in 2010.

jennifer@hefftrans.com

206-324-3623

Michelle Brown
Senior Transportation Engineer

Michelle specializes in complex analyses for a variety of projects with experience in Washington, Oregon, Montana, and Alaska. She provides project management, detailed technical support, project design review, and expert witness services for projects throughout the Puget Sound region. Michelle offers research and grant writing services for public agencies. She has extensive experience preparing transportation sections of environmental review documents. Michelle has provided transportation planning and engineering services since 1994 and joined Heffron Transportation in 2001.

michelle@hefftrans.com

425-379-5689

Julie Royson
Transportation Engineer

Julie specializes in managing complex field data collection efforts. She manages traffic impact analyses, parking studies, and provides technical support for large development projects. Julie serves as a transportation engineer for planning and development projects for private sector and public agencies. Julie provides transportation planning support for several school districts in the Pacific Northwest. She has consulted as a transportation engineer since 1991 and joined Heffron Transportation in 2001.

julie@hefftrans.com

425-392-3922

Elizabeth Swan
Transportation Planner

Elizabeth specializes in program development, with specific knowledge of institutional programs affected by Commute Trip Reduction requirements and Transportation Management Plans. She excels in documentation, implementation, and evaluation of best practices. She has expertise in seasonal industries, collaborative operating partnerships, commercial passenger transportation, and institutional program management strategies. Elizabeth has worked in transportation operations and management since 2001 and joined Heffron Transportation in 2017.

elizabeth@hefftrans.com

425-419-4622

Robbie Frankel E.I.T
Transportation Engineer

Robbie specializes in creating complex traffic operations analysis models, with experience developing both macroscopic and micro-simulation models. He works on a variety of projects, including work for public agency projects, large-scale developments, and significant institutional developments. He has experience planning and executing large-scale parking studies for both on-street and off-street parking facilities. Robbie joined Heffron as an engineering intern in 2014, and continued with the firm as a transportation engineer after his graduation from the University of Washington in 2015.

robbie@hefftrans.com

206-397-3187