1. Business appointments

1974-1976, Svetozar Marković University, Mechanical Engineering Faculty, Sestre Janjić 6, 34000 Kragujevac, Yugoslavia, U. Teaching assist.,

1977-1978, Syracuse University, Syracuse, New York, USA, & State University of New York, Syracuse, New York, Research technician,

1978-1984, Svetozar Marković University, Mechanical Engineering Faculty, Sestre Janjic 6, 34000 Kragujevac, Yugoslavia, U. Teaching assist.,

1984-1990, Svetozar Marković University, Mechanical Engineering Faculty, Sestre Janjic 6, 34000 Kragujevac, Yugoslavia, Assistant professor,

1990-1992, Svetozar Marković University, Mechanical Engineering Faculty, Department of Energy and Process Engineering, Sestre Janjic 6, 34000 Kragujevac, Yugoslavia, Associate professor,

1992-1995, University of Kragujevac,    Mechanical Engineering Faculty, Department of Energy and Process Engineering, Sestre Janjic 6, 34000 Kragujevac, Yugoslavia, Associate professor,

1995-1999   University of Kragujevac, Department of Energy and Process Engineering, Sestre Janjić 6, 34000 Kragujevac, Yugoslavia, Full Professor of Mechanical Engineering Faculty, (Thermodynamics, Heat engineering, Heating, Air Conditioning, Solar Energy),

1999-2001 The Hong Kong Polytechnic University, Department of Building Services Engineering, Hong Kong, Professorial Research Fellow.

2002-      University of Kragujevac, Department of Energy and Process Engineering, Sestre Janjić 6, 34000 Kragujevac, Yugoslavia, Full Professor of Mechanical Engineering Faculty, (Thermodynamics, Heat engineering, Heating, Air Conditioning, Solar Energy).

2 Career appointments

1990-92, Assistant Dean for Scientific Research of Mechanical Engineering Faculty, Svetozar Marković University,   Sestre Janjic 6, 34000 Kragujevac, Yugoslavia.

1992-94; Head of Department of Energy and Process Engineering, Mechanical Engineering Faculty, University of Kragujevac, Sestre Janjic 6, 34000 Kragujevac, Yugoslavia.

1994-96; Director, of Energy Technology Center, Mechanical Engineering Faculty, University of Kragujevac, Sestre Janjic 6, 34000 Kragujevac, Yugoslavia.

1996-02;     Director of Energy Management center, Mechanical Engineering Faculty, University of Kragujevac, Sestre Janjic 6, 34000 Kragujevac, Yugoslavia.

2003-;              Director of Center for Heating, Air Conditioning and Solar Energy, Mechanical Engineering Faculty, University of Kragujevac, Sestre Janjic 6, 34000 Kragujevac, Serbia and Montenegro.

2003-               Member of expert board for technical sciences at University of Kragujevac.