Who We Are
McMahon is an established engineering, architecture and consulting firm with more than a century of experience.
Our service-inspired philosophy sets us apart.
It is all about values, culture and relationships.
That is the McMahon Way.
Our History
We began in 1909 serving the Wisconsin Fox Valley and since then have expanded our reach to work with clients and projects across the country and even around the world. Our firm is headquartered in Neenah, Wisconsin with offices in Illinois and Indiana. We are proud of the strong reputation we have earned among our clients and the long-term partnerships we have developed.
Learn more about our history:
1909
Albert E. McMahon founds A.E. McMahon Engineering Company.
1944
Company incorporates with the state of Wisconsin as McMahon Engineering Company.
1944
Merritt O. Clinton
President 1944 – 1968
1965
Company name changes to McMahon Associates, Inc.
1968
Arthur Scholl
President 1968 – 1971
1969
Company moves from downtown Menasha, WI to a new office on Midway Road in Menasha, WI.
1971
Robert E. McMahon;
President 1971 – 1985
1985
Dennis J. Lamers
President 1985 – 2018
1987
Affiliate Midwest Contract Operations, Inc. (MCO) incorporates serving municipalities with contracted operations and technical support. MCO becomes independent company in 2013.
1989
Regional McMahon office established in Valparaiso, Indiana.
1991
McMahon, Inc. established as company’s Design/Build firm.
1993
Regional McMahon office established in Machesney Park, IL.
1993
Miller Wagner Coenen parters with McMahon offering additional architectural services and is incorporated under the name Miller Wagner Coenen/McMahon, Inc. (MWCM).
1995
Corporate headquarters relocates to McMahon Drive within McMahon Business Park in Neenah, WI.
2005
SlaM Architects partners with MWCM.
2008
Architecture and Engineering services merge and operate under a single entity – McMahon.
2009
McMahon celebrates 100th anniversary.
2014
McMahon celebrates 105th anniversary.
2018
Paul E. Benedict;
President 2018 – present
2020
McMahon Associates, Inc. acquires the assets of RW Management Group, Inc., a Wisconsin-based public and emergency management consulting firm.
2021
RW Management Services moves under the umbrella of McMahon as Public Safety and Municipal Management service group.