About Us
Mechanical Contractors in Milwaukee
JM Brennan, inc. is located in Milwaukee, WI and proudly serves all of Southeastern Wisconsin. We’re your single-source mechanical contractor for HVAC, plumbing, process piping, controls, industrial sheet metal, and 24/7 service.
Why JM Brennan?
The craftsmen at JM Brennan understand the mechanics behind every component in your building. That’s why we’re able to offer solutions for even the most demanding projects. JM Brennan is the preferred mechanical contractor for hospitals, commercial buildings, universities, and manufacturing facilities.
Customer Focused
Our customer-driven approach is why we have been around for over 85 years.
24/7 Service
When you have a 911 call, we'll pick up the phone 24/7 to dispatch a technician.
High Quality Work
We build on a tradition of quality, workmanship, and superior value.
Dedicated Craftsmen
JM Brennan employs more than 375 talented, experienced tradespeople and skilled technicians.
Fleet of 130 Trucks
The green JM Brennan trucks make up the largest mechanical fleet in Milwaukee.
Proactive Solutions
JM Brennan knows your building's needs and will offer insightful solutions.