Cap Bomberry played for the Oshweken Warriors from 1959 to 1973 and won the President's Cup in 1964, 1967 and 1968. He was involved in minor organization from 1975 to 1988 and was a Team/General Manager with the Jr. A Arrows from 1990 to 1992 winning the Minto Cup in 1992. This was the first indigenous team to win the Minto Cup. He was also the GM for the Six Nations Chiefs from 1993 to 1997 winning the Mann Cup in 1994, 1995, and 1996. Cap was President and GM of the Six Nations Rivermen from 2013 to 2019 winning the President's Cup in 2015 and 2019.

Bomberry has been a builder of the sport of lacrosse in the Six Nations minor organization, coach of Pee Wee and Bantam national championships, and Midget provincial championship. He traveled to Australia when Six Nations athletes competed for Team Canada in the World Field Lacrosse Championships and with the Iroquois Nationals when Ontario hosted the World Indoor Championships.

Bomberry has been inducted into the Ontario Lacrosse Hall of Fame in 1997 in the Builder Category. He was also inducted into the Canadian Lacrosse Hall of Fame in 2001 as a Builder, became an Ontario Lacrosse Association (OLA) Life Member in 2006 and was presented with the OLA President's Award.