On television, Heusinger is best known for the roles of Lord Marcus on the CW teen drama Gossip Girl, where he appeared on four episodes in 2008, and Adam on USA Network's Royal Pains in 2010 and 2011. He currently is in a recurring role as Max McCarthy on Bravo TV's first original scripted series Girlfriends' Guide to Divorce. Other television credits include 30 Rock, The Good Wife, Law & Order: Special Victims Unit, Rescue Me, Unforgettable, and Necessary Roughness.