6/1984 - 1/1985 - Engineering Geologist , Vodproekt
2/1985 - 2/1988 - Ph.D. Student, Geotechnical Laboratory, Bulgarian Academy of Sciences
3/1988 - 9/1989 - Researcher, Geotechnical Laboratory, Bulgarian Academy of Sciences
10/1989 - 2/1995 - Research Associate, Geotechnical Laboratory, Bulgarian Academy of Sciences
2/1995 - 10/1996 - Research Associate, Geological Institute, Bulgarian Academy of Sciences
11/1996 - till now - Research Associate Professor, Geological Institute, Bulgarian Academy of Sciences
5/2000 - 11/2005 - Vice-Director of Geological Institute, Bulgarian Academy of Sciences
11/2005 - 2014 - Director of Geological Institute, Bulgarian Academy of Sciences