Quanta Services designs, builds, upgrades and maintains infrastructure for utilities, power producers, technology companies and other customers. Its work ranges from power lines and substations to the electrical and mechanical systems inside data centers and manufacturing facilities.

Ferrovial SE (FER) is a leading global infrastructure operator and mobility solutions provider headquartered in Madrid, Spain. Established in 1952 by Rafael del Pino Moreno, the company has grown into one of the most prominent players in the construction, infrastructure, and transportation sectors.

Comfort Systems USA is a U.S. mechanical and electrical contractor founded in 1997 and headquartered in Houston. Brian Lane is President and Chief Executive Officer.

EMCOR Group is a specialty contractor that designs, installs, starts up, operates and maintains the electrical and mechanical systems used in buildings and industrial facilities. It provides electrical and mechanical construction, facilities services, building services and industrial services through approximately 100 operating subsidiaries.

APi Group provides services that help customers install, inspect and maintain building safety systems and infrastructure. Its work includes fire protection, electronic security, elevators and escalators, as well as specialty contracting and utility services.