Chairman, LEPC
Director-General for Research, CERN (1976-1980) and Commandeur de l'Ordre de Léopold (Belgium)
Chairman, Fellowship Selection Committee
Deputy Division Leader, DD
Secretary, ISRC (1976-1983)
Chairman, SPSC (1979-1981)
Chairman, Intersecting Storage Rings Committee (ISRC)(1980-1984) CERN
Chairman PSCC (1981-1985)
ACCU Chairman