McMahon Associates, Inc. (McMahon) has provided professional engineering and architectural services to our valued customers for more than a century. Our team of 150+ professional engineers, architects, surveyors, technicians, field personnel, and administrative specialists located in our corporate headquarters in Neenah, Wisconsin and additional offices in Illinois and Indiana. They share the common goal of delivering our services ‘The McMahon Way’. That means we strive to build long-term client relationships by combining strong core values with a culture for success.

Great emphasis is placed on adding value to all phases of a project. This Value-Added business philosophy combined with our diverse design capabilities contribute to our solid history of repeat business.

McMahon's broad spectrum of services are provided by our in-house staff of professionals. These include Municipal Engineering, Transportation, Water Resources, Environment & Ecology, Parks & Recreation, Site Development, Land Surveying, Geospatial Solutions, GIS Development, Architecture, BIM, Wastewater & Water Engineering, Waste-to-Energy, Structural Engineering, Electrical/Controls, Mechanical HVAC, Plumbing Design, Industrial Engineering, Public & Emergency Management, Funding Strategies, Solutions and Grant Assistance, Construction Services, Design-Build, & Operations Assistance.



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