Hellman was the outstanding athlete at the 1992 Junior World Championship in Maribor, Slovenia . He achieved podium positions in all five disciplines, won three gold medals in slalom, super-G and combined, a silver medal in giant slalom and a bronze medal in downhill. In December of the same year he won his first points in the World Cup with 22nd place in the Super-G of Val-d'Isère . On March 7, 1993, Hellman achieved the best World Cup result of his career with ninth place in the Aspen Super-G . Two weeks later he finished 19th in the Kvitfjell Super-G , but after that he was not among the fastest 20 in any other World Cup races until his last World Cup starts in January 1997.
Hellman represented his country as one of 84 athletes at the 1994 Winter Olympics in Lillehammer, Norway . In both giant slalom and slalom he was eliminated in the first round, in Super-G he finished 19th and in the combination he was 13th. His second and last major event was the 1996 World Cup in the Spanish Sierra Nevada . He finished 31st in the Super-G and 37th in the downhill, but retired in slalom and combined. At national level, Hellman won four Swedish championship titles from 1993 to 2001 , two in downhill and two in combination.