Geoff Osika owes his musical training to John Schaeffer, former principal bass of the New York Philharmonic, who conditioned him to gain acceptance at both the Juilliard School and the Curtis Institute of Music after only three years of study; and Roger Scott, former principal bass of the Philadelphia Orchestra, who taught him the craft of orchestral bass playing.

After Curtis, Geoff embarked on several years of full-time orchestra jobs. From 1992 to 2003 he held positions with the Hong Kong Philharmonic, the Orquesta Sinfonica de Galicia in Spain, and the Oregon Symphony.

He is currently principal bass of the Long Beach Symphony Orchestra, and a regular substitute with the LA Opera, LA Chamber Orchestra, Santa Barbara Chamber Orchestra and the Pasadena Symphony. Geoff is also part of the recording industry in Los Angeles having played for TV, motion pictures and video games. He has been the Adjunct Professor of Bass at CalState Los Angeles since 2005, and was formerly professor of bass at the Hong Kong Academy for the Performing Arts. He is also the dedicated bass player for the Pageant of the Masters, the unique annual tradition in Laguna Beach.