He was a postdoctoral fellow at the University of Illinois at Urbana-Champaign (1985- 1988). In 1988 he moved to the University of Crete where he accepted a research/teaching position until 1991. He has been a researcher at IESL/FORTH between 1991-1997 and at the Department of Physics from 1997-1999. In 2002 he was appointed to a permanent administrative position. He retired from the Univ. of Crete in 2020 but he continues to support Skinakas Observatory on a volunteer part-time basis.