GCA Services Group, Inc., an ABM Company, is a leading national provider of quality facility services, including janitorial/custodial services, contamination control for cleanroom manufacturing, facilities operations and maintenance, grounds management, in-sourced production staffing and labor management, diversified staffing, and more. With over 37,000 employees in 46 states, the District of Columbia, and Puerto Rico, GCA serves a variety of sectors, including K-12 schools, higher education, manufacturing, corporate office buildings, high-tech, bio-pharmaceutical, nuclear power, defense, the rental car market, and others. Our clients include numerous Fortune 100 companies. GCAÕs management team is recognized as one of the strongest and most experienced in the industry.