[3] Other plays include Breaking Up at Primary Stages; Ice at Manhattan Theatre Club; Black Angel at Circle Repertory Company; The Lady and the Clarinet (starring Stockard Channing), produced by the Mark Taper Forum, Long Wharf Theater, Off-Broadway and on the London Fringe; and Amazing Grace (1996; starring Marsha Mason), which received the American Theater Critics Award as the best play produced in the United States during the 1996–1997 season.

[citation needed] For eight years, he worked as artistic advisor and finally co-artistic director of River Arts Repertory in Woodstock, New York, a company which produced plays by writers such as Richard Nelson, Mac Wellman, and Eric Overmeyer, including the American premiere of Edward Albee's Three Tall Women, a production that later moved to Off-Broadway.

He collaborated with trumpeter Terence Blanchard, writing the libretto for Champion, a boxing opera in jazz music based on the life of prize fighter Emile Griffith.

[4] After a 15-year hiatus, Cristofer returned to his acting career, appearing in Romeo and Juliet (New York Shakespeare Festival), Trumpery by Peter Parnell, Three Sisters (Williamstown Theater), Body of Water (with Christine Lahti), and the Broadway revival of A View from the Bridge (starring Liev Schreiber and Scarlett Johansson).

He recently appeared in The Other Woman (with Natalie Portman), and created the role of Gus in Tony Kushner's The Intelligent Homosexual's Guide to Capitalism and Socialism with a Key to the Scriptures at the Public Theater.