Great Lakes Mechanical is among the leaders in providing solutions for mechanical and heating, ventilation and air conditioning (HVAC) contracting needs. The company offers a range of services, from renovations to new construction and design-build. It is organized into service and control divisions. Great Lakes Mechanical staffs more than 200 professional employees. The company is based in a 48,000-square-foot facility in Dearborn, Mich. Great Lakes Mechanical has been serving customers in Michigan for more than 50 years.