Peter Bay became Music Director and Conductor of the Austin Symphony Orchestra in 1998 and Conductor of the Arizona Philharmonic in 2018. Guest conducting appearances with eighty different orchestras include the National, Chicago, St. Louis, Houston, Dallas, Baltimore, New Mexico, New Jersey, North Carolina, San Antonio, Syracuse, Virginia, West Virginia, Colorado, Hawaii, Jacksonville, Alabama, Eugene, Fort Worth, Bochum (Germany), Carinthian (Austria), Lithuanian National, and Ecuador National Symphonies, the Minnesota and Algarve (Portugal) Orchestras, the Louisiana, Buffalo, Rhode Island, and Boca del Rio (Mexico) Philharmonics, the St. Paul Chamber Orchestra, and the Eastman and Aspen Opera Theaters. Summer festival appearances have included Aspen and Bravo Colorado (CO), Grant Park and Ravinia (IL), Round Top (TX), and Skaneateles (NY). He is the primary conductor for Ballet Austin, and for Austin Lyric Opera he conducted A Streetcar Named Desire, La Traviata, Turandot, The Marriage of Figaro, and La Bohème.