Krieger became a member of the Doors in 1965, joining keyboard player Ray Manzarek, drummer John Densmore and vocalist Jim Morrison, after Manzarek's brothers left the group. At an early Doors rehearsal Morrison heard Krieger playing bottleneck guitar and initially wanted the technique featured on every song on the first album. Krieger's fingerstyle approach to the electric guitar, broad musical tastes, and songwriting helped establish the Doors as a successful rock band in the 1960s. Together with Densmore, he studied under Indian sitarist Ravi Shankar at the Kinnara School of Music in Los Angeles.