Peter Bay became Music Director and Conductor of the Austin Symphony Orchestra in 1998 and is also Conductor of the Big Sky Festival Orchestra (MT) and Arizona Philharmonic. 

Maestro Bay has appeared with over eighty different orchestras including the National, Chicago, St. Louis, Houston, Dallas, Baltimore, New Jersey, North Carolina, San Antonio, Tucson, West Virginia, Colorado, Hawaii, Sarasota, Fort Worth, Bochum (Germany), Carinthian (Austria),  Lithuanian National, and Ecuador National Symphonies, the Minnesota and Algarve (Portugal) Orchestras, the Louisiana, Buffalo, Arizona, Rhode Island and Boca del Rio (Mexico) Philharmonics, the St. Paul Chamber Orchestra, the Eastman (Postcard from Morocco) and Aspen (The Ballad of Baby Doe) Opera Theaters, and the Theater Chamber Players of the Kennedy Center. Summer music festival appearances have included Aspen and Music in the Mountains (CO), Grant Park and Ravinia (IL), Round Top (TX), OK Mozart (OK) and Skaneateles (NY).  In June 2018 he led fully staged performances of Leonard Bernstein’s Mass as part of the Bernstein100Austin celebration.

Peter is the primary conductor for Ballet Austin. For Austin Opera he has conducted A Streetcar Named Desire, La Traviata, Turandot, The Marriage of Figaro, and La Bohème. Other positions held by Bay have included Music Director of the Erie Philharmonic, Annapolis Symphony Orchestra, Breckenridge Music Festival (CO), Britt Festival Orchestra (OR), Hot Springs Music Festival (AR), and posts with the Rochester Philharmonic Orchestra, St. Paul Chamber Orchestra, and Richmond Symphony. Bay and the ASO with pianist Anton Nel released a critically acclaimed Bridge CD of Edward Burlingame Hill’s music. With the Richmond Symphony he recorded the U.S. premiere of Britten’s The Sword in the Stone for Opus One Records, and with the Rochester Philharmonic Orchestra Voices, featuring the percussion ensemble NEXUS. He is conductor for Christopher Cross’ Secret Ladder album and Hanan Townshend’s soundtrack to the 2016 movie The Vessel.

In 1994, he was one of two conductors selected to participate in the Leonard Bernstein American Conductors Program. He was the first prize winner of the 1980 Baltimore Symphony Orchestra Young Conductors Competition and a prize winner of the 1987 Leopold Stokowski Competition sponsored by the American Symphony Orchestra. In July 2012 and January 2020, he appeared in Solo Symphony, a choreographic work created for him by Allison Orr of Forklift Danceworks, and was inducted into the Austin Arts Hall of Fame in May 2016.