 He soon moved into the role of a player/coach under manager Ricky Hill, and when Campbell retired from the pitch in 2013, he became a full-time assistant coach.In August 2015, first-year Rowdies coach Thomas Rongen was fired after the club struggled to a 2–2–6 start to the NASL's fall season.Campbell was promoted to manager and led the team to a 3–4–4 record over their remaining games.