|Competitor for Canada|
|Pan American Games|
|1999 Winnipeg||Individual Competition|
She graduated from the Royal Military College of Canada in 1990, (17324) with a B.A. (Commerce). She served as an Army Logistics Officer for 5 years. She won the gold medal at the 1999 Pan American Games in Winnipeg, Manitoba, Canada.
To pursue a spot on the 2000 Olympic team, she transferred to the Reserves in 1995. Donnelly competed at the first Olympic triathlon at the 2000 Summer Olympics. She took thirty-eighth place with a total time of 2:14:35.59. Sharon continued racing with an aim of making a second Olympic team in 2004 but missed the team by 22 seconds. She was a Team Alternate for Athens 2004 Olympics.
In the fall of 2004, Sharon retired from the sport and the Reserves. She was Race Director for the inaugural Canadian Forces Base triathlon in Kingston, Ontario in May 2004. She taught physical education at Saint Lawrence College, and coached local junior, age group triathletes.
Since moving to Colorado Springs in 2006, Sharon has worked at the United States Olympic Training Centre as assistant National Triathlon Team coach.