Directing credits include work at the American Repertory Theater, Atlantic Theater Company, The Signature Theater, Williamstown Theater Festival, New York Stage & Film, Joe's Pub, Ensemble Studio Theater, Barrington Stage Company, Naked Angels, Symphony Space, and many others. Mr. Bernstein has worked in various capacities at New York's City Center, Manhattan Theatre Club, Second Stage Theatre, Roundabout Theatre, and 52nd Street Project, where he writes, directs and teaches.

His plays & musicals have been produced all over the country, including In This House, written with Sarah Schlesinger and Mike Reid and The Shape She Makes, written in collaboration with actress/choreographer Susan Misner. Broadway/London supervising director credits include Private Lives starring Alan Rickman and Lindsay Duncan, The Iceman Cometh starring Kevin Spacey and Paul Giamatti, Who's Afraid Of Virginia Woolf? starring Dame Diana Rigg and David Suchet, and the musical Chicago, including the 1996 Broadway revival and the many national and international companies it spawned. In all, he has been the supervising director of fourteen New York productions, eight of which have been on Broadway. Additionally, he is an Artistic Associate at the Eugene O'Neill Center's National Theater Institute (helping to create & run their new musical theater training program in the Fall of 2014), he is the Artistic Director of The Performing Arts Project (an international arts training intensive), and he is a New York Mets fan which is often difficult.