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At McMahon, our success is built on the dedication and hard work of our people. Every day, our team invests their talent and passion into shaping the places they call home. From designing essential infrastructure to improving public spaces and planning sustainable solutions, our team is driven by a shared commitment to delivering results that truly matter. These efforts not only strengthen communities but also build trust and deepen the relationships we’ve cultivated with our clients over the years. With more than 150 professionals headquartered in Neenah, Wisconsin, and additional offices in Illinois and Indiana, McMahon thrives because of the people who care deeply about their work. Their dedication has defined us for more than a century and continues to guide us into the future.

Website http://www.mcmgrp.com
Revenue $8 million
Funding $2 million
Employees 162 (115 on RocketReach)
Founded 1909
Address 1445 McMahon Drive, P.O. BOX 1025, Neenah, Wisconsin 54956, US
Phone +1 920-751-4200
Technologies
Industry Civil Engineering, Architecture, Engineering & Design, Process, Industrial & Structural, Construction, Civil, Environmental, Stormwater & Transportation, Architecture, Land Surveying & Site Development, GIS, Electrical & Plumbing, Design/Build and Project Management, Sustainable Solutions, Funding & Grant Assistance
Web Rank 5 Million
Keywords Engineering Design, Architectural Design, Building Design, Construction Services, Project Management, Site Development, Design Build, Infrastructure Engineering, Structural Engineering, Civil Engineering, Survey Services, Building Information Modeling, Cad Services, Sustainable Design, Master Planning, Mechanical Engineering, Electrical Engineering, Environmental Engineering, Geotechnical Engineering, Municipal Engineering
Competitors WSP, Jacobs, AECOM, HDR, Stantec, Gensler, HOK, Skidmore, Owings & Merrill (SOM), The Kubala Washatko Architects +31 more (view full list)
SIC SIC Code 87 Companies, SIC Code 871 Companies
NAICS NAICS Code 54 Companies, NAICS Code 54133 Companies, NAICS Code 5413 Companies, NAICS Code 541 Companies

McMahon Engineers/Architects Questions

The McMahon Engineers/Architects annual revenue was $8 million in 2026.

Denny Lamers is the PRESIDENT, CEO, Chairmain of the Board of McMahon Engineers/Architects.

115 people are employed at McMahon Engineers/Architects.

McMahon Engineers/Architects is based in Neenah, Wisconsin.

The NAICS codes for McMahon Engineers/Architects are [54, 54133, 5413, 541].

The SIC codes for McMahon Engineers/Architects are [87, 871].

Top McMahon Engineers/Architects Employees

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