Since 1983, Mr. Harrington has been producing and directing theatrical productions throughout the tri-state area. His work has been featured at such venues as the world renowned Lincoln Center Out-Of-Door Festival in Manhattan to The Tilles Center for the Performing Arts to the Lehman Center for the Arts. While a student at New York University, Mr. Harrington studied with such notable theatre veterans as Agnes DeMille, Alfred Drake, Marni Nixon, and Larry Fuller. Additionally, he directed the world premiere of the opera Daddy's Money. Most recently, he produced the world premiere of Nelson DeMille's children's play, Rumpelstiltskin. Sponsored by the League of American Theatres and Producers, he participated in the 2004 Commercial Theatre Institute, is a 2006 graduate of their certification program, and is a member of The New Producer Alliance. Recently, he produced the equity showcase Go Go Beach for the New York Musical Theatre Festival.

As a director, and an associate member of The Society of Stage Directors and Choreographers (SSDC), he has staged over two hundred productions including Cabaret, Evita, Fiddler on the Roof, Goin' Hollywood, Gypsy, Hello Dolly, Into the Woods, Irene, Joseph, La Cage Aux Folles, Little Shop of Horrors, My Fair Lady, Nunsense, Oliver, Pippin, Side by Side by Sondheim, State Fair, Sweeney Todd, The Sound of Music and Zorba.

Along with his wife, Phyllis, their greatest productions to date are their children, Alex and Emma.