Certstaffix Training provides training to businesses & organizations in the Largo, MD area. Our training classroom in the Washington, DC area is located at: 1300 Caraway Court, Suite 200 Largo, MD 20774 Our DC training facility is located in ACS Executive Suites, off the Capital Beltway (I-495) at Exit 17A (Route 202) with easy access to Route 50 and Interstate 95. There is free parking and is Metro accessible (Blue Line), located adjacent to The Boulevard at Capital Center.