William Wrzesien taught at New England Conservatory from 1966, when he completed NEC's Artist Diploma, through 2007. He served as NEC's woodwinds faculty chair beginning in 1979, and also chaired NEC's Preparatory woodwinds faculty during the 1970s and '80s.
During his years at NEC, Wrzesien was principal clarinetist of the Boston Ballet Orchestra and the Boston Lyric Opera Orchestra. A founding member of the Boston Music Viva Contemporary Music Ensemble, he has performed as a soloist and chamber music player at major concert venues and festivals, including Tanglewood, Marlboro, Lincoln Center, Kennedy Center, the Library of Congress, the Arnold Schoenberg Institute at USC, ISCM World Music Days, Jeunesses Musicales Berlin, Brucknerfest, Edinburgh, and Holland Festivals. He has served as principal clarinetist with the Handel & Haydn Society, the Opera Company of Boston Orchestra, the Boston Classical Orchestra, and the Boston Pops Esplanade Orchestra. He has appeared as guest artist with the Naumburg Award–winning Lydian String Quartet and Emmanuel Wind Quintet ensembles, as well as with the Boston Symphony Chamber Players and Collage New Music Ensemble.
B.M. in music education, M.M. and A.D. in clarinet performance, NEC. Fellow, Tanglewood Music Center. Clarinet with Rosario Mazzeo. Recordings on Delos, Deutsche Grammophon, CRI, Nonesuch, Northeastern, Neuma, and Musical Heritage. Former faculty of Boston Conservatory, University of Massachusetts/Lowell, and Longy School of Music.