Broadway theatre | West End theatre | musical theatre | Royal National Theatre | theatre | Royal Court Theatre | American Ballet Theatre | Musical theatre | National Theatre | Theatre Royal, Drury Lane | National Wrestling Alliance | Bolshoi Theatre | Abbey Theatre | Haymarket Theatre | Theatre Royal | Play (theatre) | Alliance '90/The Greens | Globe Theatre | Alliance for Italy | Theatre | Mariinsky Theatre | Manhattan Theatre Club | Lyric Theatre | Théâtre du Châtelet | Her Majesty's Theatre | Grand Théâtre de Genève | Théâtre des Champs-Élysées | Theatre 625 | Goodman Theatre | Canadian Alliance |
Among his more recent acting projects has been playing Jesus in the Alliance Theatre's re-imagining of Webber-Rice's Jesus Christ Superstar (re-titled JCS Gospel).
Regional theaters employing Hilferty's costumes have included the Guthrie Theater, La Jolla Playhouse, Goodman Theatre, Court Theatre, Berkeley Rep, Yale Rep, McCarter Theatre, Alliance Theatre, Indiana Rep, Kennedy Center, Williamstown Theatre Festival, and American Conservatory Theater.
Theatres in which Appel worked include Intiman Theatre, the Guthrie Theater, Indiana Repertory Theatre, Seattle Repertory Theatre, South Coast Repertory, PlayMakers Repertory Company, Arizona Theatre Company, Alliance Theatre Company, Milwaukee Repertory Theater, New Mexico Repertory, The Goodman Theatre, Court Theatre, Syracuse Stage, Repertory Theatre of St. Louis, San Jose Repertory Theatre, Utah Shakespearean Festival, and the Alabama, Colorado and Kern Shakespeare Festivals.