Among his other film credits are Bart Freundlich's Trust the Man, Amy Talkington's short film Second Skin, and the Sundance-screened Rhinoceros Hunting in Budapest. He also had roles in Bittersweet Place, The Memsahib, Lovely by Surprise, and Neal Cassady.
Glenn has always been known as a character actor portraying various roles in independent films. In 2002, he was given the Gertrudis Award, a special award handed out by the Chlotrudis Society for Independent Film.
Glenn attended college in Brooklyn for about two years before deciding he'd rather work than to train so much. After doing some classes at Playwrights [Horizons] and attending workshops at New Dramatists, most of his learning came from actual work.
The audiobook version of Danielle Steele's novel "Miracle" was narrated by Glenn.
In 2007, TV Guide named Glenn their Number One Scene Stealer for 2007 in his role as Brian Darling on Dirty Sexy Money.
Glenn made his TV acting debut in the CBS series New York News while his film debut was in Manny & Lo, shown at Sundance. His theatrical debut was in Jon Robin Baitz's Mizlansky/Zilinsky performing opposite Nathan Lane.
Glenn appeared in the European version of the music video for Natalie Imbruglia's "Wishing I Was There".
In 2001, Glenn played a lead role in an Off-Broadway play Lobby Hero, written by Kenneth Lonergan. His other theatrical credits include Blue/Orange, Tatjana in Color and Heda Gabler.
Aside from being a model and an actor, Glenn is also a professional photographer.
Glenn is an alumnus of Bishop Ford High School in Brooklyn, New York.
He has been nominated for a Chlotrudis Award for Best Supporting Actor for his role in Tully in 2000. He was also nominated for a Lucille Lortel Award for "Outstanding Lead Actor" for his role in the play Lobby Hero.
Glenn: (on the film "Tully") I liked it. Even more than those edgy things, what appeals to me is the gentleness and slowness that reveals itself in a deeper, more personal way.
Glenn: (on the challenges of stage work) Sometimes people shout out from the audience. One guy actually called out to one of the actors, 'Is your name Jackson? Hey, are you Jackson?' We just kept going. Now we call that actor Jackson. It's an interactive show. 'Come on up! Tell us about you'.
Glenn: (on being chosen as one of the 50 "Beautiful People" of Paper Magazine) It's all kind of new to me in a certain way, I'm usually in the background about these kinds of things.
Glenn: (on the opportunity to lose himself in the characters he plays) That's always been an appealing part of acting for me. To a certain extent it's getting away from myself or trying to embody something different.
Glenn: (on seeing himself in a magazine) I get alienated by it. Even just seeing that picture in Paper Magazine -- I was just telling a friend the other day -- I felt alienated by it. You've got an identification, you know that's you, your name is there, but it's like, "hmmm".
Glenn: (about "Flirting With Disaster") That was a really fortunate break. A lot of doors opened for me.