Martin Petersen Company, Inc. (MPC) is a Mechanical Contractor, providing HVAC, Piping, and Plumbing solutions to the Industrial, Commercial, and Governmental industries in Southeastern Wisconsin and Northeastern Illinois.

Martin Petersen Company is a mechanical contractor, metal fabricator, design engineers, temperature control, and service contractor. As a mechanical contractor Martin Petersen Company with its sheetmetal, piping, and plumbing divisions, fabricates and installs complete heating, ventilation, exhaust, air conditioning, and plumbing systems. Our temperature control and service divisions have a fully staffed 24 hour service department which designs and installs temperature control systems and services residential, commercial, and industrial equipment.