McMAHON Associates, Inc.

McMahon Associates, Inc. (McMAHON) has provided professional engineering and architectural services to our valued customers for more than a century. Our team includes 150 professional engineers, architects, surveyors, technicians, field personnel, and administrative specialists, working from offices in Wisconsin, 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. We do an extensive amount of work in the communities where we live and throughout the Midwest. But we have also provided professional services in locations spanning the United States, and even internationally.

McMAHON Associates, Inc.
Tammy Scott
815-636-9590
1700 Hutchins Rd.
Machesney Park, Illinois 61115 US
Texting: MCMAHON to 866-866-5545
Email Us

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Business Hours

7:30 AM - 5:00 PM

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