Commissions include: Manhattan Theatre Club, where he was an Alfred P. Sloan playwriting fellow, The Playwrights' Center of Minneapolis, and Actors Theatre of Louisville.
John F. Kennedy | Pope John Paul II | Elton John | John | John Lennon | John Wayne | John McCain | John Kerry | John Cage | Olivia Newton-John | John Williams | John Peel | John Adams | John Steinbeck | John Travolta | John Milton | John Zorn | John Marshall | John Howard | John Singer Sargent | John Ruskin | John Updike | John Maynard Keynes | John Coltrane | John Cleese | St. John's | John Waters | John Lee Hooker | John Huston | John Ford |
Cohen's success as a teacher of playwrights and promoter of new plays is indicated by the large number of scripts by his students that have been accepted for development or performance by theatres and workshops throughout the United States, including John Walch, Clay Nichols, Emily Cicchini, P. Seth Bauer, Catherine Rogers, Joseph Skibell, Hank Schwemmer, C. Denby Swanson, Dan Dietz, and Lisa D'Amour.