[1] O'Neil's first rallying experience was in 1986, racing a Saab 99 he had prepared, winning Canada's Novice of the Year.

[1] O'Neil drove a United States Air Force Reserve sponsored Group N Subaru WRX to many National class wins in 2002.

[3] Tim spent much of the 2000s training rally drivers who later went on to win many national championships, including Travis Pastrana, Ken Block, Dave Mirra, and many more.

He began competing again in 2006, driving a Subaru WRX STI, in several events in the Rally America National Championship in 2006 and 2007.

During 2014, O'Neil drove EVSR, the fully electric racecar created by Entropy Racing, during Subaru's Climb to the Clouds Hillclimb at Mt Washington, NH.