William Klingelhoffer, one of two Co-Principal Horn players in the San Francisco Opera Orchestra, studied in Chicago with Stu Liechti, Nancy Fako, Frank Brouk, and Dale Clevenger and graduated from Northwestern University with a Bachelor of Music degree.
Bill began playing professionally with the Chicago Lyric Opera at the age of 19. Since then, he has played Principal Horn for the Opera Companies of Chicago, Houston, and Santa Fe, played extra and toured with the Chicago and San Francisco Symphonies, played for films, radio/TV commercials, and musical shows, toured and recorded with the Summit Brass Ensemble, appeared as a soloist and chamber musician throughout the San Francisco Bay Area, and given masterclasses at International Brassfests held at Indiana University and Long Beach, California; University of Victoria, Canada; and Sacramento State University. He is a member of the San Francisco Ballet Orchestra, and has also performed and recorded with cabaret singer Wesla Whitfield.
His wife, Jill Brindel is a cellist with San Francisco Symphony and the Navarro Trio. Daughter Sarah teaches at Berklee College of Music in Boston, sings and composes. He has two sons, Louis and Jacob.
In 2006 Bill played guest Principal Horn on three concert series for St. Paul Chamber Orchestra. He played Principal Horn for San Francisco Ballet for their 2007 and 2008 repertory seasons.