Bernard Haitink first conducted the Concertgebouw Orchestra on 7 November 1956. After van Beinum's death, Haitink became the orchestra's first conductor in September 1959. From 1961 to 1963, Haitink and Eugen Jochum shared the post of chief conductor of the orchestra. Haitink became the only chief conductor in 1963, and continued in this post until 1988. He had “assistant conductors”, including Edo de Waart and Hans Vonk.