New York credits include James Whelan in the U.S. Premier of Teresa Deevy's Wife to James Whelan (Backstage Memorable Performance of 2010), John Rutherford in Rutherford & Son (Mint Theater Company); Hotspur in Henry IV, Part 1, Philinte in The Misanthrope (Pearl Theatre Company, Lortel Nomination for Best Revival); Apparition (understudy, Connelly Theatre); Peninsula (Soho Rep); Dearest Eugenia Haggis, Freakshow (both world premieres, Clubbed Thumb); Binge (The Shalimar); Cats Talk Back, Pale Idiot (FringeNYC); Wonton Destruction (3-Legged Dog); The High Priest of Bad Math (Ontological BluePrint Series); Antigone (Horace Mann Theatre/Columbia University).

Regional theatre credits include: Prince Hal/King Henry in The Making of a King: Henry IV & V (Playmakers Repertory Company); Caleb in The Whipping Man (Cleveland Play House); Krogstad in Nora (Westport Country Playhouse); Horatio in Hamlet, Hugh in The Voysey Inheritance (Denver Center Theatre Company); Acaste in The Misanthrope (Dallas Theatre Center); Hamlet in the premiere of Wittenberg, Mercutio in R&J, Picasso, et al in the premiere of Wanamaker's Pursuit (Arden Theatre Company); Texas in Intimations for Saxophone (Arena Stage, dir. Anne Bogart); Interpreter in All's Well That Ends Well (Shakepseare Theatre Company, DC); Edgar in King Lear, Marchbanks in Candida (Utah Shakespearean Festival); War of the Worlds/Radio Play (SITI Company, U.S. Tour); Christy in The Playboy of the Western World, Compleat Wrks of Wllm Shkspr [abridged] (Pennsylvania Shakespeare Festival); Mercutio in Romeo & Juliet (Shakespeare Theatre of New Jersey); Romeo in R&J, Charles Courtly in London Assurance, Sebastian in Twelfth Night, Soothsayer/Titinius in Julius Caesar, Ambrose Kemper in The Matchmaker (American Players Theatre); The Wizard of OZ, A Christmas Carol (Actors Theatre of Louisville); A Moon for the Misbegotten (Delaware Theatre Company); Bootleg King John, Bootleg Hamlet: The Bad-Ass Quarto, Bootleg Love's Labour's Lost, And Then it Faster Rock'd, The Skinhead Hamlet (Taffety Punk); The Tempest, Twelfth Night (Stonington Opera House).

Shawn spent several years as the Associate Artistic Director of LightBox, an ensemble theatre company based in New York. With the company I played Fred in Milk-N-Honey (also co-writer), Ajax in AJAX: 100% FUN, Andy Warhol/Peter Beard/Myself in Shutter (which I co-wrote with Artistic Director Ellen Beckerman), Konstantin in Gull, Pylades in Chuck Mee's Orestes, Laertes/Guildenstern (and later Claudius) in Hamlet, and various characters in Fanatics.