Damian grew up in Washington, DC and moved to New York in 1984. On Broadway, Damien appeared in Sacrilege with Ellen Burstyn. He also spent many years with The Cucaracha Theatre Company and worked in other off - Broadway venues including Soho Rep, The Vineyard Theatre, Playwright Horizons, The Flea and The Atlantic. He has worked with film directors Hal Hartley, Daisy Mayer, M. Night Shamayazan and Nicholas Hytner, among others. In 2000, he starred in the USA Series The War Next Door.

Other television appearances include The Law and Orders, The Jury, Cosby, The Adventures of Pete and Pete. He and actress Welker White live in Brooklyn, NY, with their two children.