After graduation, Martin briefly worked in business before turning to comedy full time, supporting himself by substitute teaching while performing in the evenings. He became a regular at the Laff Stop in
Newport Beach and by the late 1980s had secured spots at the Improv comedy clubs, marking his transition from opening act to feature performer. and a staff writer for
Just Shoot Me in 1997. He went on to work as a story editor for
The Naked Truth and contributed to various network sitcoms before transitioning into animation. He wrote and supervised for several seasons of
The Simpsons (1999–2001), winning two Emmy Awards for Outstanding Animated Program. In 2002, he served as a writer and supervising producer on
Clone High, USA for MTV. His television credits include work as a writer and supervising producer on
Nikki (2001) and
Still Standing (2003–2004), head writer for
The Showbiz Show with David Spade (2005–2006), and head writer for the PBS animated series
WordGirl (2008–2011, 2013–2014). He also served as story editor for Disney XD's
Randy Cunningham: 9th Grade Ninja (2012–2013), head writer and co-creator of
Talking Tom and Friends (2014–2016), and executive producer and voice director for
Clash-a-Rama! (2017–2019). and
Unstable Fables: Tortoise vs. Hare (2007). He has also provided uncredited punch-up writing for feature films such as
The Cable Guy and
Whistleblower, and received a special thanks credit for
The Boxtrolls. ==Writing credits==