Gregory Mosher is an American theater director and producer. He led the Goodman Theatre in Chicago and later was asked to head the theater at Lincoln Center in New York City. Mosher was at Lincoln Center from 1985-1992. While there, he launched an innovative production schedule and implemented a new marketing scheme that replaced the traditional subscriber arrangement. Under Mosher, the theater flourished. He eventually left Lincoln Center and went on to lead the Arts Initiative at Columbia University. Currently, Mosher is a professor at Columbia's School of Arts. The collection consists of production files and correspondence from Mosher's time at the Goodman Theatre and Lincoln Center as well as for productions later in his career. In addition, there are plays as well as notebooks, appointment books, and videocassettes.