Limbach Holdings, Inc. is a U.S.-based provider of comprehensive building systems solutions, engaging with both general contractors and directly with building owners. The company's services encompass the entire lifecycle of critical infrastructure, including the design, prefabrication, installation, ongoing management, and maintenance of mechanical, electrical, plumbing, control, and HVAC systems. Its specialized facility offerings include mechanical construction, HVAC servicing and upkeep, energy audits and retrofits, engineering and design-build capabilities, constructability evaluations, equipment and material selection, offsite prefabrication, and sustainable building strategies. Limbach caters to a wide array of clients across various sectors such as healthcare (hospitals, research centers), education (K-12, universities, colleges), entertainment (sports arenas, amusement parks), transportation (airport and rail facilities), government (federal, state, local agencies), hospitality (hotels, resorts), commercial real estate (office buildings), technology (data centers), and industrial manufacturing. Founded in 1901, the company is headquartered in Pittsburgh, Pennsylvania.