Limbach Holdings, Inc. operates as a building systems solution company in the United States. It operates through two segments, General Contractor Relationships and Owner Direct Relationships. The company engages in the construction and renovation projects that involve primarily include mechanical, electrical, and plumbing services. It also provides professional and consultative services; replacements and retrofit solutions; rental equipment solutions; maintenance and repairs; energy efficiency solutions; and decarbonization roadmaps solutions. The company serves research, acute care, and inpatient hospitals; public and private colleges, universities, research centers; entertainment facilities, and amusement rides and parks; data centers; automotive, energy and general manufacturing plants; and life sciences, including organizations and companies, whose work is centered around research and development focused on living things. Limbach Holdings, Inc. was founded in 1901 and is headquartered in Warrendale, Pennsylvania.