Mark Bendorf was a former head coach at Chantilly before joining the Robinson staff as defensive coordinator under Hilgert. Bendorf was the first coach to lead the school to a state title in football, which he did in his first season of 1997, with a perfect 14–0 record. In total, he has led the team to three state title games, winning twice (1997 & 2001) and runner-up (2004) once. Coach Bendorf also helped produce running back Mike Imoh (class of 2002), who went on to star for Virginia Tech (2002–05). Robinson's regular season records under Bendorf were impressive, specifically from 1999-2005, when the Rams lost only four regular season games in seven seasons. Bendorf is a 1974 graduate of Marshall High School, where he played under head coach Ed Henry, with Nick Hilgert on staff.