​Mark teaches acting, improv, and filmmaking online, at the The Barrow Group in New York City, and in Washington, D.C. His students and coaching clients have appeared in films from Columbia Pictures, Lionsgate, and Paramount; series on Comedy Central, HBO, and Netflix; national commercials; and on Broadway. He's taught workshops and professional development seminars at Columbia University, The Ford Foundation, The Fulbright Association, Kaye Scholer LLP, Marymount Manhattan College, New York Film Academy, Pearson Education, Travelocity, Twitter, WebMD, and more. He studied acting and directing extensively with Seth Barrish and Lee Brock at The Barrow Group, improv and sketch comedy at Annoyance Theater and The Upright Citizens Brigade, and filmmaking at the Graduate School of Cinema at Brooklyn College.