Limbach Holdings, Inc. is an integrated building systems solutions firm. The Company is focused on the design, modular prefabrication, installation, management and maintenance of heating, ventilation, air-conditioning (HVAC), mechanical, electrical, plumbing and controls systems. The Company 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. It 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.