 In 1994, Green, a resident of Potomac Falls, Virginia, co-founded the Lafayette Group with Charles B. DeWitt, a Washington, D.C., government contractor that focuses on public safety and emergency management; as of 2014 the firm employs 90 people.Green started in the NFL as a field judge with the start of the 1991 NFL season before switching to back judge after the league swapped position titles at the start of the 1998 NFL season.Green worked Super Bowl XXXVI on February 3, 2002 as a back judge, Super Bowl XXXVIII on February 1, 2004 also as a back judge, and Super Bowl XLIV on February 7, 2010 as referee.