Stephen began his career in 1987 with Bay Area Theatresports in San Francisco, where he was a company member for 14 years. He was a proud company member of Pulp Playhouse, as well as a founding member of Improv Theater, True Fiction Magazine, 3 FOR ALL, and the critically-acclaimed Impro Theatre in Los Angeles (Nominated for an Ovation Award for The Western UnScripted).

Stephen is the co-creator of "Simlish" and was the principal male voice of The Sims, Sims 2, and Sims Medieval. He created the Martian languages for Disney’s Mars Needs Moms and Supergirl. He is featured in the DreamWorks Animation films Kung Fu Panda 1-3, Madagascar 2 & 3, Monsters vs. Aliens, Megamind, The Penguins of Madagascar, and Home.
 
Stephen appeared as the terrifying 'Principal Mitchell' on the Disney XD series Kirby Buckets. He portrayed the role of Sergeant Geller on Amazon Prime's hit show WAYNE.

Stephen has been a visiting instructor at Stanford University, the US Olympic Ski Team, Disney & DreamWorks Animation, and Cirque du Soleil.
 
He wrote and performed his solo show INSIDE OUT, playing to sold-out houses in San Francisco and Los Angeles. You can read or hear his stories on STEPHENKEARIN.SUBSTACK.COM or visit www.stephenkearin.com