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 ORIGINS

From a single-practitioner firm to a well-rounded team of professionals in offices
located through the East Coast, McMahon
is built on a history of being
our clients' trusted advisor on transportation & data management challenges.

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Innovation, integrity and cost-effectiveness are hallmarks of every McMahon solution. 

 

Joseph McMahon - Founder 

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For more than 40 years, McMahon grew from one employee, Joe, to more than 200, and from a single discipline to services for every transportation project - big or small.

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When we look over our history, the thousands of projects we've worked on and the ongoing excitement for new opportunities on the horizon, we are proud of where we came from. Take a look below for a quick snapshot of McMahon's history... so far. 

TODAY

2010s

2000s

2019 

  • 15 offices

  • 32 shareholders

  • 200+ employees

  • TRAISR, LLC formed

2018

  • New office - Westfield, MA

  • Casey Moore & Gary McNaughton - Executive Vice President 

  • Joseph & Peggy McMahon Transportation Engineering Scholarship created

2017

  • New office - Philadelphia, PA

  • McMahon Wellness program created

  • Bill Steffens - Chairman of the Board

2016 - 40th Anniversary of McMahon

  • 13 offices

  • 29 shareholders

  • 150+ employees

  • 4,000+ clients

  • 18,000+ projects

  • McMahon Gives Back charitable program named

2014

  • New office - Providence, RI

2013

  • New office - Allentown, PA

2012

  • McMahon forms TRAISR

  • 11 offices

2010

  • Rod Plourde retires & JD becomes President & CEO

  • 110+ employees

2009

  • New office - Pittsburgh, PA

2007

  • New office - Taunton, MA

2006

  • New office - Yardville, NJ

2005

  • Company changes from C-Corporation to Subchapter S-Corporation for shareholder expansion

  • FL Expands to Miami 

  • 65+ employees

  • Service - GIS

2004

  • Headquarters purchased at 425 Commerce Dr., Fort Washington, PA

  • Service - ITS, IT, Structures

2002

  • McMahon extends stock ownership

  • Rod Plourde - President

  • Joe McMahon - Chairman of the Board

  • FL Expands to Fort Lauderdale & Fort Myers

2000

  • Major Expansion in Pennsylvania - Harrisburg & Exton offices open

  • 35 employees

1999

  • Gary McNaughton joined the firm

  • Service - Survey, Walking & Biking

1997

  • New office - Boston

  • Bill Steffens joined the firm

  • Service - Major Highway Design

1995

  • John DePalma & Chris Williams joined the firm

1994

  • 10 Employees

  • Rod Plourde named Principal, JD named Associate

  • Joe McMahon shares firm ownership with Rod & JD

1990s

1991

  • Rod Plourde & Casey Moore joined the firm

  • Service - Roadway Design, Transit Planning

1987

  • C-Corporation Status - McMahon Associates, Inc. 

  • 1st Florida office - Boca Raton

1986

  • Joseph DeSantis (JD) joined the firm

1985

  • Moving on up - out of home base into a real office in Willow Grove

  • Rt. 29 Corridor/Great Valley Corporate Center - 1st ACT 47 project in the state

  • Service - Signals

1980s

​1982

  • Willlow Grove Mall - Traffic Review

  • Downtown Fort Lauderdale - Florida Quality Development (DRI) Approved - Sun Sentinel

​1978

  • Master Transportation Plan led to work for 11 Atlantic City Casinos

  • Approval of major Development of Regional Impact - Coconut Creek, FL

1976

April 1, 1976 - Joseph W. McMahon Associates Founded

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  • Service - Traffic Engineering & Planning

2022 

  • In May 2022, McMahon joined Bowman Consulting Group Ltd., and now forms the large majority of employees in their transportation division

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