J. M. Brennan, Inc.

Milwaukee, Wisconsin · Other / Unclassified Online RFQ 90+ years

Est. 1932 · sheet metal +1 · Quotes online · ✓ verified live · Aug 2026

J.M. Brennan is Wisconsin’s most trusted mechanical contractor. From design and installation to service, we’re built on a tradition of quality and service.

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Compiled from jmbrennan.com and public sources — a free listing, never paid placement.