Mr. Mauceri has achieved an extraordinary track record on Broadway as music director/supervisor and co-producer. In addition to his work as music director and arranger of the 1973 Broadway production of Candide (special Tony Award for the Advancement of Musical Theatre), he originated and co-produced a new production of Rodgers and Hart's 1936 musical On Your Toes in 1983, enlisting members of its original artistic team: George Abbott, then 96 years old, choreographer, George Balanchine (then 87), and orchestrator Hans Spialek (also 87). On Your Toes won two Tony Awards (including one for Mr. Mauceri), the Drama Desk Award, as well as the Outer Circle Critics Award. In London, On Your Toes garnered two Olivier Awards. In 1985, Andrew Lloyd Webber asked Mauceri to serve as music supervisor for the Broadway production of Song and Dance, for which Bernadette Peters won a Tony Award. In 1989, Mr. Mauceri accepted the Olivier for best musical for his new adaptation of Candide for Scottish Opera/ The Old Vic.

Throughout much of his professional career, Mr. Mauceri has been a principal force behind the movement to preserve two of America's great art forms - the American musical as well as the music for the American cinema. As music theater consultant to the Kennedy Center, he not only supervised On Your Toes but also initiated a number of precedent-making grants from the National Endowment for the Arts to restore the classic Broadway scores from the 1930s and 1940s. With the legendary orchestrator Hans Spialek, the scores for The Boys from Syracuse, Anything Goes, and Pal Joey were restored. After Spialek's death, Mr. Mauceri supervised a reconstruction of Kurt Weill's Lady in the Dark. He also served as music director of the Kennedy Center's orchestras from 1979 until 1988 and conducted the tenth anniversary production of Leonard Bernstein's Mass (1981, which was also telecast), the revised version of A Quiet Place (both the American and European premieres), as well as Rodgers and Hammerstein's Carousel in a production he conceived with Oscar Hammerstein II's son, James.

Mr. Mauceri has created additional orchestrations for Leonard Bernstein's Candide, Decca's recording of Die Dreigroschenoper (The Threepenny Opera), as well as for the new edition of Kurt Weill's Der Weg der Verheissung (The Eternal Road). As a Trustee of the National Institute for Music Theater, he urged the creation of a catalogue of all extant music theater materials of Kern, Berlin, Gershwin, Rodgers, Arlen, and Porter. In 1989 he was asked by Mrs. Ira Gershwin to make the first recordings in her extraordinary recording project with the Library of Congress to publish and record all the works of George and Ira Gershwin. The first recording, Girl Crazy (1930, Gershwin/Gershwin), received an Edison Award as well as High Fidelity Magazine's Record of the Year Award, and the first complete recording of Strike up the Band (1927 and 1930) continued the series. In 1992 his Hollywood Bowl recording, Gershwins in Hollywood, includes more than an hour of restored music. His 2007 recording of Porgy and Bess with the Nashville Symphony restores the 1935 Performing Edition and is the capstone in his work on the music of George Gershwin.