Born in Wausau, Wisconsin in 1938, Warren was exposed to music and to the piano at an early age. His father Lawrence was a pianist and teacher and a close friend to other pianists, among them the Russian virtuoso Joseph Lhevinne, who actually gave Warren his very first training at the keyboard. At the age of five, Warren's family relocated to New York City where Warren immediately began serious study of the classical piano literature with well-known pianists Sascha Gorodonitzki, Miklos Schwalb and Herbert Stessin, as well as with his father. In 1957, following his father's untimely death, Warren left music behind for several years while he majored in organic chemistry and physics at the University of Chicago. While living in this city rich in the tradition of jazz and blues, he once again became entranced with music -- this time with the fresh and exciting jazz improvisations of George Shearing, Oscar Peterson, Miles Davis, Wynton Kelly, and especially with the work of John Coltrane and Bill Evans. Soon thereafter, Warren joined the touring jazz sextet of saxophonist Paul Winter, and in 1962 the legendary John Hammond of Columbia Records brought the sextet to New York to record. Warren has remained in the New York area ever since, recording and touring, as a jazz pianist, accompanist, sideman, arranger, producer and bandleader. He is also known as one of New York's finest musicians, having received the National Academy of Recording Arts and Science's (NARAS) Most Valuable Player Award for acoustic piano on four different occasions. Warren has toured and recorded with Jack Dejohnette, Gerry Mulligan, Jeremy Steig, Mike Mainieri, Gary McFarland, George Young and Kazumi Watanabe, among others, and he has accompanied such great singers as Donald Fagen, Carly Simon, Tim Hardin, Art Garfunkel, Richie Havens, Michael Franks, Patti Lupone, and Liza Minnelli. After recording several albums as a leader on the Arista label in the late 1970s, Warren served as keyboardist and co-leader of the well-known jazz fusion group Steps Ahead from 1983-85. Since then he has focused primarily on his own trip concerts and recordings and has conducted jazz workshops at the State University of New York in New Paltz. He was recently the pianist with the Steely Dan band on their historic 1993 and 1994 US tours, and their 1994 first-ever tour to Japan. In 1994 he was also musical director of Steely Dan. In the spring of 1996, Warren recorded a three-CD set of solo performances: a CD of classical works, a CD of jazz standards, and a CD of original compositions and improvisations. These have been released on Warren's new label, Big Guy Sounds (BGS). In '03 and '04 he played with Simon & Garfunkel on their "Old Friends" tours. Warren is currently in school full time, training to become a Pilates instructor. He has been doing occasional concerts with saxophonist David Newman, guitarist Artie Traum and singer Marc Black. He lives with his family near Woodstock in New York state's Hudson Valley.