MACTEC is a consulting firm that provides engineering, environmental and remedial construction services to public and private clients located throughout the world. The company operates more than 90 offices throughout the United States and employs more than 3,000 people. It is comprised of three operating units, including MACTEC Engineering and Consulting, MACTEC Development Corporation and MACTEC Federal Programs. MACTEC Engineering and Consulting provides consulting services pertaining to clients' environmental, operational and maintenance concerns. MACTEC Development Corporation provides expert decontamination, decommissioning and dismantlement services to government and commercial nuclear facilities. MACTEC Federal Programs is a provider of MACTEC's services to the federal sector. MACTEC is headquartered in Alpharetta, Ga. The company has an office in Atlanta, Ga.