Legence Corp. operates as a specialized mechanical contractor and engineering firm focused on optimizing building performance and energy efficiency across the United States. The company operates through two primary segments: Engineering & Consulting, and Installation & Maintenance. The Engineering & Consulting division designs HVAC and MEP systems, develops energy reduction strategies, and provides project management for retrofits and new builds. The Installation & Maintenance segment handles the physical fabrication and installation of process piping and MEP infrastructure, while also delivering ongoing preventative maintenance and repair services. Legence targets non-residential facilities that require high operational uptime, deriving a majority of its revenue from data centers, technology firms, and life sciences clients. Originally founded as Therma Holdings, the company has grown through strategic acquisitions to offer comprehensive decarbonization and sustainability solutions for commercial and industrial real estate.