|Born||Queens, New York, United States|
|Alma mater||Binghamton University|
After college, he began his career as an NBC page. Among his duties as a page was working for Saturday Night Live. As a Rockefeller Center tour guide, Koren would hand jokes to David Letterman and Dennis Miller as they passed in the hall, which landed him a writing gig on SNL. He also occasionally acted for the series.
Later, he became a writer for Seinfeld, and wrote the episodes "The Abstinence," "The English Patient," "The Serenity Now," and "The Dealership," and he was one of the contributors to the teleplay for "The Puerto Rican Day". In the episode "The Van Buren Boys," a character named Steve Koren is George Costanza's choice for the first Susan Biddle Ross Scholarship to be granted by the Susan Ross Foundation.
Koren has executive-produced several films, including some he wrote as well as Adam Sandler's Grown Ups (2010) and Just Go with It (2011). Koren also wrote the movie Superstar starring Molly Shannon and Will Ferrell.