Warren is the founding artistic director of the American Shakespeare Center. He directed the ASC’s first show and grew the ASC touring scope from 14 performances of Richard III in Virginia to over 200 performances of three full-length Shakespeare plays and one modern classic in six countries during 1995. In 2001, the ASC opened the Blackfriars Playhouse, the world’s only re-creation of Shakespeare’s indoor theatre. Before retiring from the ASC in 2017, Warren created Shakespeare’s New Contemporaries, a groundbreaking undertaking to develop a new canon of 38 plays that are inspired by and in conversation with Shakespeare’s work. He is a member of the Theatre Communications Group and Shakespeare Theatre Association.