Harmston competed on Last Comic Standing. Harmston won a Rusty Nail award at the Aspen RooftopComedy Festival in 2008. He has appeared on NBC and Comedy Central. In 2011 he released his first album, "The Most Bees Ever," which was acquired by Stand Up! Records, and remastered, repackaged and re-released in 2014.
Harmston is married to comedian Mary Mack.