For more than 100 years, Limbach Facility Services LLC has been providing mechanical and sheet metal contracting services. Based in Pittsburgh, Pa., the firm offers a range of services from the inception to the completion of a project, including plumbing, heating, ventilation, air conditioning, piping and energy retrofit/management systems. Its expertise in construction includes pre-construction, design build, commissioning, safety, facility services and building automation. Some of the firm's clients include Sony, General Motors, Ford Motors, Lockheed-Martin, DuPont and Hewlett-Packard. Limbach Facility Services LLC has association with the Architecture, Construction and Engineering Mentor Program, Design-Build Institute of America (DBIA) and U.S. Green Building Council.