employments

1996-2009: Professor, Department of Pure Mathematics, University of Calcutta,India

1997, 1998: Head, Department of Pure Mathematics, University of Calcutta, India

1986-1996: Reader, Department of Pure Mathematics, University of Calcutta, India

1979-1986: Lecturer, Department of Pure Mathematics, University of Calcutta, India

1977-1979: Lecturer, Department of Mathematics, University of Burdwan, West Bengal, India

1972-1977: Lecturer in Mathematics, R. K. Mission Vidyamandir Degree College, West Bengal, India