He served as Vice President of the League of Composers – International Society for Contemporary Music from 1982–1989, and was also composer-in-residence for the Orchestra of St.
His works have been commissioned and performed by organizations such as the St. Luke's Chamber Ensemble, Greenwich Symphony, Fairfield Chamber Orchestra, American Brass Quintet, Borealis Wind Quintet, Bellevue Philharmonic, Detroit Chamber Winds, Western Piedmont Symphony, School for Strings, L'Amore di Musica, New York State Council on the Arts, the Philip-Morris Companies, Jerome Foundation, University of Arizona, University of Oklahoma, Music Academy of the West, and by soloists such as Julius Baker, Mindy Kaufman, Philip Smith, Joseph Alessi, and Eugene Becker (of the New York Philharmonic), Toni Lipton and Scott Brubaker (of the Metropolitan Opera), Olegna Fuschi, Rebecca Scott, James Houlik, Linda Strommen, and Leon Russianoff, among others.
[3] The third movement of Ewazen's Symphony in Brass is used as the theme music for National Public Radio's political coverage.
[4] Among his recorded works are the "Ballade for Clarinet, Harp & String Orchestra" (John Russo); "Colchester Fantasy" (American Brass Quintet on Summit Records);[5] "Sonata for Viola and Piano" (Eugene Becker on Clique Trak), "Symphony in Brass" (Summit Brass on Summit Records); "The Tiger" (William White on Hyperion Records), "The Diamond World" (Ahn Trio), and Well-Tempered Productions has released an all-Ewazen disc of "Frost Fire", "...to cast a shadow again", "Quintet for Trumpet and Strings", "The Palace of Nine Perfections" (University of Oklahoma Percussion Ensemble), and "Sonata for Horn & Piano" featuring the American Brass Quintet, Chamber Ensemble of St. Luke's and Grammy winner William Sharp.
There are three discs dedicated to his music on the Albany Records label: "Sejong Plays Ewazen" with the International Sejong Soloists, "Orchestral Music and Concertos" with the Czech Philharmonic Chamber Orchestra conducted by Paul Polivnick, and "Bass Hits," a collection of concert pieces for bass trombone and various ensembles.