In the early 1990s, Alexander studied at the American Film Institute, where he became interested in directing. His television credits include 32 episodes of Law & Order (on which his stepfather, Edwin Sherin served as an executive producer) and 18 episodes of Rescue Me, in addition to Xena: Warrior Princess, Arli$$, Homicide: Life on the Street, The Practice, Ally McBeal, Third Watch, House M.D., Prison Break, Golden Boy, Jodi Arias: Dirty Little Secret and the pilots for Burn Notice, Warehouse 13, Royal Pains, Edgar Floats, and Three Inches. Alexander was Second Vice-President of the Directors Guild of America, but resigned only two months later following his arrest on child pornography charges. He was replaced by Brooke Kennedy.