Director, International Institute of Information Technology , Bhubaneswar from October 2023 till date.
	Professor (HAG), Machine Intelligence Unit, Indian Statistical Institute, Kolkata from March 2022 till date.
	Project Director, Technology Innovation Hub, Indian Statistical Institute, Kolkata from August 2020 till October 2023.
	Professor, Machine Intelligence Unit, Indian Statistical Institute, Kolkata from June 2005 till February 2022.
	Head,  Machine Intelligence Unit, Indian Statistical Institute, Kolkata from August 2019 to July 2021.
	Adjunct Professor, Department of Computer Science and Engineering, Indian Institute of Technology (ISM), Dhanbad, from July 2017 to July 2019.
	In-Charge, Center for Soft Computing Research, Indian Statistical Institute, Kolkata from April 2010 - September 2019.
	Visiting Professor, King Mongkut's University of Technology Thonburi, Thailand, during March-April, 2016.
	Visiting Professor, RWTH-Aachen University, Germany during September 2010 and May-June 2013.
	Head, Machine Intelligence Unit, Indian Statistical Institute, Kolkata from January 2013 - December, 2014.
	Visiting Professor, Hannan University, Osaka, Japan during October-November, 2008.
	Visiting Professor, Yonsei University, Korea, December 2006-January, 2007 and April, 2015.
	Associate Professor, Machine Intelligence Unit, Indian Statistical Institute, Calcutta during June 1998 to May 2005.

	Guest Faculty, Utkal University, Bhubaneshwar, Orissa; Jadavpur University, Kolkata; Calcutta University, Kolkata.
	Visiting Professor, Hannan University, Osaka, Japan during February-April, 2005.
	Visiting Professor, Hannan University, Osaka, Japan during September-October, 2004.
	Visiting Professor, University of California, Los Angeles, USA from October to December 2003.

	Guest Researcher, Warsaw University of Technology, Warsaw, Poland during March-April, 2000.
	Visiting Researcher, German National Research Center for Information Technology (GMD), St. Augustin, Germany during January-April, 2000 (on leave from the Machine Intelligence Unit, Indian Statistical Institute, Calcutta).
	Lecturer, Machine Intelligence Unit, Indian Statistical Institute, Calcutta (from May 1995 to May 1998).

Visiting Scholar, Hannan University, Osaka, Japan during September-October, 1997 (on leave from the Machine Intelligence Unit, Indian Statistical Institute, Calcutta).

Research Scientist, Department of Industrial Engineering, Osaka Prefecture University, Osaka, Japan from October 1995 to March 1997 (on leave from the Machine Intelligence Unit, Indian Statistical Institute, Calcutta).

Computer Engineer, Machine Intelligence Unit, Indian Statistical Institute, Calcutta from December 1993 to May 1995.

Research Associate, Machine Intelligence Unit, Indian Statistical Institute, Calcutta from April 1993 to December 1993.

Senior Research Fellow, Electronics and Communication Sciences Unit, Indian Statistical Institute, Calcutta from August 1989 to April 1993.

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