Limbach Holdings, Inc. engages in the provision of commercial specialty contractor services in the areas of heating, ventilation, air-conditioning, plumbing, electrical and building controls for the design and construction of new and renovated buildings, maintenance services, energy retrofits, and equipment upgrades. The company is headquartered in Warrendale, Pennsylvania and currently employs 400 full-time employees. The company went IPO on 2014-07-16. The firm is focused on the design, modular prefabrication, installation, management and maintenance of heating, ventilation, air-conditioning (HVAC), mechanical, electrical, plumbing and controls systems. The firm operates through two segments: General Contractor Relationships (GCR) and Owner Direct Relationships (ODR). The Company’s GCR segment manages new construction or renovation projects that involve HVAC, plumbing or electrical services awarded to the Company by general contractors or construction managers. The ODR segment provides maintenance or service on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. The company operates primarily in the Northeast, Mid-Atlantic, Southeast and Midwest regions of the United States. Its full life-cycle capabilities include concept design and engineering.