Brush began his career as a musical composer following his graduation from Yale, where he was Pitchpipe of the
Yale Whiffenpoofs. In the 1970s he worked at
Sesame Street and
Captain Kangaroo, writing scripts and composing songs, among them the Good Morning Captain theme song. In 1981 he composed the score for the Broadway musical
The First, about baseball immortal
Jackie Robinson, which ran for 70 performances at the
Martin Beck Theatre. In 1986 he teamed with writer/producer
Jay Tarses on
The Days and Nights of Molly Dodd, starring
Blair Brown, and
The Slap Maxwell Story with
Dabney Coleman. Beginning in 1988 he executive-produced and wrote
The Wonder Years for its run of over 100 episodes, and followed with
Early Edition, starring
Kyle Chandler. His final work in Los Angeles was a 2012 television film,
Scruples. In 2022, Brush published a novel,
The Piazza: Stories from Piazza Santa Caterina Piccola. ==Personal life==