Morse was one of the first female varsity captains in Yale history and the only junior in that group, in 1972/73, when she co-captained the field hockey team with Lawrie Mifflin, former Senior Editor at the New York Times.
[3] Morse's editing career began in September 1976 as an assistant to Ralph Rosenblum on Annie Hall.
Morse edited Rosenblum's first film, an adaptation of James Thurber's short story, The Greatest Man in the World (1980) starring Brad Davis; she was also an associate editor working with Thelma Schoonmaker on Raging Bull (1980), directed by Martin Scorsese.
[6] Bernard Weinraub wrote, "What especially stirred the New York film world in recent weeks was the disclosure that Susan E. Morse, Mr. Allen's widely admired film editor for 22 years, would not be working on his new, untitled movie, which starts shooting in New York in August.
[citation needed] Since 1998, Morse has edited films with several directors including Marc Lawrence, with whom she's worked on Two Weeks Notice (2002), Music and Lyrics (2007), and Did You Hear About the Morgans?