Monarch Welding & Engineering, Inc.

Monarch Welding & Engineering is a family-owned Michigan specialty contractor with over 100 years of combined industry experience spanning five generations of the Wimmer family. The company operates four locations across Michigan — Warren (headquarters), Bay City, Muskegon, and a fourth facility — with more than 40,000 square feet of fabrication and equipment repair shop space in total. Monarch performs a broad range of ASME code work including manufacture of pressure vessels (U stamp), power boilers (S stamp), and pressure piping (PP stamp), as well as National Board R stamp repair and alteration of pressure equipment. Beyond code fabrication, the company provides structural steel erection, mechanical piping (ASME B31.1 power and B31.3 process), energy recovery systems (waste heat, carbon capture, green hydrogen), ship repairs, and 24/7 emergency maintenance. Clients span automotive (Ford, GM, Detroit Diesel), energy (DTE, Consumers Energy, Marathon), chemical (Dow, DuPont), food manufacturing (Kellogg's, Cargill), pharmaceutical (Pfizer), and steel production (U.S. Steel). The Bay City facility holds ASME PP and U stamps (BizID 52886) and the Warren facility holds ASME S and PP stamps (BizID 53488). Monarch holds UA-certified pipe fabrication credentials, AWS code welding certification, Michigan Mechanical Contracting and Plumbing Licenses, and a Professional Engineer License.