After playing one season in Italy with Val Pusteria HC, O'Marra signed with Elite Ice Hockey League (EIHL) team Coventry Blaze in the in the 2004 World U- 17 Hockey Challenge, defeating Canada Pacific to earn the gold medal.
After playing one season in Italy with Val Pusteria HC, O'Marra signed with Elite Ice Hockey League (EIHL) team Coventry Blaze in the United Kingdom for the 2014--15 season. O'Marra played in his first international tournament with Canada Ontario in the 2004 World U- 17 Hockey Challenge, defeating Canada Pacific to earn the gold medal.