American radio and television showrunner, comedian, writer and producer, known, along with his brother Eric Stangel, as the head writers of Late Show with David Letterman from 1998 to 2013.
As co-head writer for The Late Show, Stangel was part of a team that has won two Primetime Emmy Awards (in 2001 and 2002), received twenty-one total Emmy nominations, and was nominated for Writers Guild of America awards four times.
In December 2009 Stangel and his brother Eric were promoted to executive producers for The Late Show. The Stangel brothers are the longest-serving head writers in the history of Letterman’s late night shows.
Eric and Justin in 2012 published their first book Goodnight Husband, Goodnight Wife which won an Independent Publishing Award in the category of Humor.
In 2012 he wrote additional material for the 84th Annual Academy Awards hosted by Billy Crystal which was nominated for an Emmy Award for outstanding Writing For A Variety Special.
In 2015, Justin and Eric Stangel were added to the staff of Opie with Jim Norton on Sirius XM. On 15 March 2016 Opie announced that the Stangel Brothers officially resigned from their role with the show to be Executive Producers on the daytime television show they co-created, Harry starring Harry Connick, Jr. In two seasons, Harry was honored with 11 Daytime Emmy nominations (2 wins) and a Critics Choice Award nomination.

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