Hewitt made his international debut at the 1991 Pacific Championship in Sagamihara , where he won the gold medal.
Hewitt played as the lead of the Australian team in the XVI. 1992 Winter Olympics in Albertville in curling. The team took seventh place. He has participated in the World Cup several times with the Australian team . He achieved the best result at the World Championships in 1992 and 2008 with a sixth place.