Dr. Matija Zorn
(1975–),
the institute director since 2018.

Dr. Drago Perko
(1961–),
the institute director from 1994 to 2018.

Milan Natek
(1933–),
the institute director from 1992 to 1994.

Dr. Drago Meze
(1926–2003),
the institute director from 1987 to 1991.

Dr. Milan Šifrer
(1928–),
the institute director from 1983 to 1987.

Dr. Ivan Gams
(1923–2014),
the institute director from 1981 to 1983.

Dr. Svetozar Ilešič
(1907–1985),
the institute director from 1967 to 1981.

Dr. Ivan Rakovec
(1899–1985),
the institute director from 1966 to 1967.

Dr. Anton Melik
(1890–1966),
the institute director from 1948 to 1966.