Coming from a Polish-American family, Pete Siers' first exposure to music came from listening to polkas at home. Starting piano lessons at the age of 6, he continued with the ivories until he heard the US Army Big Band with a drummer who impressed Siers to the point that he switched to drums.

Siers earned a music degree from Aquinas College where he played with the jazz ensemble. In 1984, he joined the John Shea Trio and then moved on to play with Detroit pianist Eddie Russ, opening the door to gigs and recording sessions with such Detroit musicians as Paul Keller, Bess Bonnier and blues and boogie woogie piano player Mr. B. Since 1987, Siers has been a member of the Keller-Kocher Quartet, which released its first album Midnight Sun in 1993.

Siers is comfortable with virtually any style of jazz music. In addition to performing with big bands and small groups, he has performed with musicians representing dissimilar styles, including Lee Konitz, Sonny Fortune, Doc Cheatham, Frank Morgan and Warren Vache. He has appeared at the North Sea, Playboy, Sunfest and other major jazz festivals in the United States and Europe. Siers also heads Los Gatos, a Latin jazz quintet featuring the music of Cal Tjader and the Pete Siers Quartet, which explores creative improvisional material.