He got his start writing for
Late Night with David Letterman. He continued working with the show through its move to
CBS, serving as both head writer and the "guy in the bear suit". After five years in
Late Night, Cary moved to
The Simpsons, where he served as a co-executive producer for four seasons (seasons 7-11). He then served in the same capacity on
NBC’s
Just Shoot Me! and
Parks and Recreation,
HBO’s
Bored to Death, and
Fox’s
New Girl. Cary has produced pilots for and developed with Brillstein Grey, Sony Television,
Happy Madison, Conaco, ABC, NBC, CBS, FOX, FX, HBO, the WB and Nickelodeon. In 2007, Donick created the animated series ''
Lil' Bush'' (a satire of U.S. President
George Bush Jr.) for Amp'd mobile cell phones. The show was then picked up by
Comedy Central and became the first mobi/web-series ever to move from cell phones to television. To handle the animation, Cary founded Sugarshack Animation with offices in Los Angeles, Miami, and Sofia, Bulgaria. Cary wrote for and produced
Silicon Valley for HBO. In 2020, he directed a feature documentary entitled
Have a Good Trip (a comic exploration of tripping) for
Ben Stiller’s
Red Hour Films. == Writing credits ==