1969–1971 – Research Trainee, Tashkent State University.
1971–1974 – Postgraduate Student (PhD Candidate), Institute of Physics, Siberian Branch of the Russian Academy of Sciences.
1974–1992 – Assistant, Senior Lecturer, Associate Professor, Department of Mathematical Analysis, Tashkent State University.
1992–1993 – Head of the Department of Mathematical Analysis, Professor, Tashkent State University.
1993–2001 – Head of the Department of Mathematical Analysis and Dean of the Faculty, National University of Uzbekistan named after Mirzo Ulugbek (formerly Tashkent State University).
2001–2005 – Rector, Karshi State University.
2005–2012 – Professor, Department of Mathematical Analysis, National University of Uzbekistan named after Mirzo Ulugbek.
Since 2012 – Present – Professor, Department of Mathematical Analysis, National University of Uzbekistan named after Mirzo Ulugbek.
Professor
Doctor of Sciences, DSc 
Mathematical analysis 
