Beguelin, a native of Centralia, Illinois, received an MFA from the graduate writing program at New York University's Tisch School of the Arts.
Beguelin wrote the book and lyrics for The Rhythm Club which was produced at the Signature Theatre, Arlington, Virginia in 2000[1] and was nominated for a Helen Hayes Award.
He wrote the book and lyrics for Wicked City, which was produced at the American Stage Company and the Mason Street Warehouse, Saugatuck, Michigan, in 2004.
As a screenwriter, Beguelin sold a script to Grammnet Productions and also worked as a staff writer for Disney's live action film department in California.
Casey Nicholaw directed and choreographed the stage musical Aladdin which ran at the 5th Avenue Theatre, Seattle, Washington, July 7–31, 2011.
[4][5] Beguelin made his Off-Broadway playwrighting debut with Harbor, directed by Mark Lamos, presented by Primary Stages, from August 6, 2013, to September 8, 2013.