Hellenkamp attended Seattle Pacific University where he played on the men's soccer team in 1979 and 1980.
On December 17, 1980, the Portland Timbers selected Hellenkamp in the first round (ninth overall) of the North American Soccer League draft.
In 1985, Hellenkamp joined the Louisville Thunder in the American Indoor Soccer Association, playing two seasons with the team.
[9] Hellenkamp retire at the end of the season, but returned in the fall of 1992 when he joined the Atlanta Magic 1992–96 USISL.
In March 1995, the Milwaukee Wave of the National Professional Soccer League signed Hellenkamp for the playoffs.