O'Brien's many Broadway credits include The Coast of Utopia, Hairspray, and Henry IV, all of which earned him Tony Awards as Best Director, along with Dirty Rotten Scoundrels, Imaginary Friends, The Full Monty, and The Little Foxes, among others.

Schumacher is the co-author (with Jeff Kurti) of How Does The Show Go On? An Introduction to the Theater, a 125-page hardcover book intended to give young people a backstage glimpse into the world of theater.