CERN Directors General typically serve 5 year terms beginning on January 1. During the 1970s CERN had co-directors.
Edoardo Amaldi 1952-1954 Felix Bloch 1954-1955 Cornelis Bakker 1955-1960 John Adams 1960-1961 (Acting Director) Victor Frederik Weisskopf 1961-1965 Bernard Gregory 1966-1970 Willibald Jentschke 1971-1975 John Adams 1971-1980 Léon van Hove 1976-1980 Herwig Schopper 1981-1988 Carlo Rubbia 1989-1993 Christopher Llewellyn Smith 1994-1998 Luciano Maiani 1999-2003 Robert Aymar 2004-2008 Rolf-Dieter Heuer 2009-present
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