CostelloMark J. Costello holds an MFA in playwriting from Temple University, and is a proud member of the Dramatists Guild.

His plays have been recognized by the Children’s Theatre of New Jersey, Write Now, and the Great Plains Theatre Conference, and his dramaturgical and critical writings earned him a fellowship to the O’Neill Critics Institute in 2010. He has dramaturged and assistant dramaturged productions for companies all over Philadelphia, including Philadelphia Theatre Company and the Arden, and he participates in new play development with playwrights at all levels of their career and training.