• Specialist in Forest Hydrology and Climatology, Climate Changes, Dendrochronology, Forest Ecology

• Head of the Department of Forest Ecology, FRI-BAS (1986–2005)

• Director of the Forest Research Institute at the Bulgarian Academy of Sciences (1995–2003)

• Chairman of the National Scientific Coordination Center for Global Change at the Bulgarian Academy of Sciences (2000–2004)

• Chairman of the Committee for Forestry at the Council of Ministers of the Republic of Bulgaria (1991 and 1992)

• Chairman of the Association “Global Water Partnership – Bulgaria” (2007 to now)