[1] She made her debut into single seater racing with the National Karting Series in the Philippines in 1999 at the age of 10.

In 2006 Bumgarner made her auto racing debut driving in the Asian Formula Three Championship, finishing third in the series' Promotion Class.

The 7th foreign-born winner in its 14-year history, Michele steered the Margay Team to a 1-2-3-4 finish with 11 minutes and 24.144 seconds.

In September 2013, Michele announced that she will join the Mazda Road to Indy program with World Speed Motorsports, to which she made two starts in the Pro Mazda Championship Presented by Cooper Tires at Houston, claiming a top-10 finish and earning the Quarter Master Hard Charger Award for most positions gained in the race.

In 2014, Michele joined the Pro Mazda Championship full-time, racing for World Speed Motorsports Team.