JM Brennan Inc

About JM Brennan Inc

J.M. Brennan, Inc. is one of Milwaukee’s largest mechanical contractors. We perform HVAC and Plumbing construction, maintenance, and service for Commercial, Industrial, and Healthcare facilities throughout southeastern Wisconsin. We have complete in-house capabilities including engineering, design, BIM, and prefabrication. We have an 87 year history of performing successful projects completed on time and on budget. We continue to build on a tradition of quality, workmanship, and superior value.



June 2017 - August 2019 Milwaukee, WI
“My coworkers were awesome!”
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