Michael McMahon

President of Engineering, Construction & Maintenance
Day & Zimmermann
Philadelphia, PA

Mike McMahon is president, Engineering, Construction and Maintenance, for Day & Zimmermann (, a global leader in industrial, defense and workforce solutions for commercial and government customers. Founded in 1901 and one of the largest family-owned businesses in the U.S., Day & Zimmermann delivers engineering, construction and maintenance services, and staffing services to the commercial and government sector, and munitions products, security, logistics, equipment maintenance and facilities management services to the Department of Defense, other government groups and defense industry contractors.

In his current role, Mr. McMahon oversees the company's Engineering, Construction and Maintenance group, which includes Day & Zimmermann Engineering, Day & Zimmermann Construction, and all maintenance and modification operations and related specialty services provided through the Day & Zimmermann NPS® and DZ Atlantic businesses. Mr. McMahon is also a member of Day & Zimmermann's Leadership Council, which makes decisions regarding overall company strategy, policy, and investment.

Mr. McMahon's more than 30 years of experience span both maintenance and construction projects in the industrial, power, petrochemical, gas, nuclear and fossil industries. Prior to his current role, Mr. McMahon was president of Day & Zimmermann Power Services, which he led through significant growth that more than doubled its size. Throughout his career he has served in a variety of senior leadership, business development and engineering roles.

Mr. McMahon holds a Bachelor of Science in Civil Engineering from Drexel University and has completed graduate coursework at The Wharton School at the University of Pennsylvania.