• 1956-1977:
Cosmic Ray Laboratory, Institute of Atomic Physics, Bucharest, Romania.
• 1977-1990: Center of Astronomy and Space Sciences, Institute of Atomic Physics, Bucharest, Romania.
• 1990-1996: Institute for Gravitation and Space Sciences, Institute for Atomic Physics, Bucharest, Romania. New strategy → involvement in major international projects.
• 1996-present: Institute of Space Science, National Institute for Lasers, Plasma and Radiation Physics, Bucharest, Romania.