1979 - 82: Post-doctoral Fellow, Allahabad University, Allahabad
1982 - 85: Scientist, National Sugar Institute, Kanpur
1985 - 86: Scientist, Biotechnology, Zentral Labotorium, Sudzucker, Germany
1987 - 2015*: Scientist, CSIR-National Institute for Interdisciplinary S&T, Trivandrum
1992*: Visiting Scientist, GBF, Germany [Sept-Oct]
1992 - 1993*: Visiting Scientist, University of Louis Pasteur, France [Dec-Jan]
1995*: Visiting Scientist, University of Louis Pasteur, France [July-Dec]
1997*: Visiting Scientist, University of Sunderland, UK [May]
1998 - 2000*: Professor Titular, Federal University of Parana, Brazil [April 1998-March 2000]
2000*: UNESCO Professor, Malaysia, Thailand [December]
2003 - 2013*: Visiting Professor, Universite Blaise Pascal, France [June/July each year]
2008 - 2010*: Visiting Professor, EPFL, Lausanne, Switzerland [December each year]
2016-2017* Eminent Scientist, Centre for Innovative & Applied Bioprocessing, Mohali
2017-cont* Distinguished Scientist, CSIR-Indian Institute of Toxicology Research, Lucknow
2017-cont* Adjunct Professor, Vellore Institute of Technology, Vellore
2017-2020* Guest Professor, Jiangnan University, Wuxi, China
2017-cont* Executive Director (Hon), Centre for Energy and Environmental Sustainability, Lucknow
2018-2021* Research Professor, Durban University of Technology, South Africa (2018-2021)
2019* Guest Professor, Yonsei University, Seoul, South Korea (March)
2019-2020*Visiting Professor, Yonsei University, Seoul, South Africa (September-August)
*Including visits to Argentina, Australia, Belgium, Brazil, Canada, China, France, Germany, Greece, Hong Kong, Hungary, Ireland, Italy, Japan, Malaysia, Mexico, Netherlands, Nigeria, Singapore, South Africa, South Korea, Spain, Sweden, Switzerland, Thailand, Taiwan, UK, USA, Viet Nam.
Editor-in-chief: Bioresource Technology- Elsevier, UK (2011-cont)
Executive Editor: Bioresource Technology, Elsevier, UK (2010-cont)
Editor: Bioresource Technology- Elsevier, UK (2004-2011)
Executive Advisor: Journal of Environmental Science and Engineering - CSIR-NEERI (2020-cont)
Honorary Chief Adviser: Systems Microbiology and Biomanufacturing- Springer Nature (2020-cont)
Associate Editor: Biologia- Section Cellular and Molecular Biology- Springer(2017-cont)
Associate Editor: Biotechnology Research and Innovation- SBB, Brazil (2021-cont)
Honorary Executive Advisor: Journal of Water Sustainability, Australia (2013-2019)
Field Editor: Food Technology and Biotechnology (2013-cont)
Honorary Executive Advisor: Journal of Energy and Environmental Sustainability- ISEES (2014-cont)
Subject Editor: Proceedings of National Academy of Sciences (India)- Part B: Biological Sciences (2016-cont)
Editor: Elsevier book series of six volumes of Biomass, Biofuels & Biorefineries (2013-2016)
Series Editor: Current Developments in Biotechnology &Bioengineering (Elsevier series of 40 books 2014-cont)
Series Editor: Biomass, Biofuels, Biochemicals (Elsevier series of 18 books, 2017-cont)
Editorial Board Member:
CURRENTLY
International:
Bioengineered, 2020-cont
Bioresource Technology Reports, 2018-cont
Iranica Journal of Energy & Environment, 2014-cont
Biofuels Research Journal, 2014-cont
The Scientific World JOURNAL, 2011-cont
Journal of Waste Conversion, Bioproducts and Biotechnology (JWCBB), 2011-cont
Food Technology and Biotechnology- 2007-cont
Biologia-Cellular and Molecular Biology, 2007-cont
Malaysian Journal of Microbiology, 2004- cont
Brazilian Archives of Biology and Technology, 1997-cont
Process Biochemistry, 1995-cont
Indian:
IBAS Science Bulletin, 2020-cont
Biotech Express, 2016-cont
Indian Journal of Biotechnology, 2002-cont
Journal of Microbial World, 2001-cont
PREVIOUSLY
The Open Industrial and Manufacturing Engineering Journal- 2007-2015
Bhartiya Vaigyanik avm Audyogik Anusandhan Patrika, 1999-2015
Journal of Scientific & Industrial Research- 2005-2014
The Open Process Chemistry Journal, 2008-2015
Bharat ki Sampada, 2005-2007
International Journal of Food, Agriculture & Environment, 2003-2004
Applied Biochemistry and Biotechnology, 2004-2015
Journal Chemtracks, 2003-2005
Bioresource Technology, 2001-2004
Indian Journal of Microbiology, 1996-2005
Indian Food Industry, 1996
Journal of Microbial Biotechnology, 1995-1999
Guest Professor, Jiangnan University, China (Dec 2021-November 2023)
Chairman, Expert Committee on Non-Specified Food and Food Ingredients, Food Safety and Standards Authority of India, New Delhi (2021-cont)
Member, Program Advisory Committee- Life Sciences and Medical Sciences, International S&T Cooperation, DST, New Delhi (2021-2024)
Member, Board of Trustees, Institute of Development Management, Jaipur (2020-cont)
Member, Research Advisory Board, VIT University, Bhopal (2019)
Advisor, Ecoshine Technologies LLP, Kaliburgi, Karnataka (2019)
Adjunct Professor, Yonsei Frontier Lab, Yonsei University, Seoul, South Korea(2019-2020)
Chairman, CSIR Expert Committee on TRL Evaluation, Agri, Nutrition and Biotehnology theme (2019)
Member, Board of Governors, SCMS Institute of Bioscience and Biotechnology Research & Development (SIBBR&D), Cochin, India (2019)
Mentor, PAN-CSIR 2G Etahnol program (2018-19)
Member, DST, New Delhi Programme Advisory Committee (PAC) for International Cooperation on Waste Management (2019)
Member, Governing Council, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Eng College, Chennai (2019)
Member, Program Advisory Committee- Chemical Sciences, International S&T Cooperation, DST, New Delhi (2018-2021)
Adjunct Professor, School of Biotechnology, Faculty of Science, SMVD University, Katra, J&K (2018-2021)
Research Professor, Durban University of Technology, Durban, South Africa (2018-2021)
Member, Scientific Advisory Committee, Institute of Bioresource and Sustainable Development, Imphal (2018-2021)
Member, DBT, New Delhi Task Force on Value-added Biomass & Products from Natural Resources (2018-2019)
Advisor, Adhita Biosciences Pvt. Ltd., Lucknow (2017-cont)
Co-chairman, DBT, New Delhi Task Force on Bioprocess and Products Development (2017-2018)
Distinguished Scientist (HTBS National Innovation Chair), CSIR-Indian Institute for Toxiocology Research, Lucknow (2017-cont)
Executive Director (Honouray), Centre for Energy and Environmental Sustainability- India (www.cees-india.org) (July 2017-cont)
Expert Member, Research, Development and Demonstration (RD&D) Programme, MNRE, New Delhi (2017)
Guest Professor, Jiangnan University, Wuxi, China (2017-2019)
Adjunct Professor, VIT University, Vellore, Tamil Nadu (2017-2020)
Member, Research Degree Committee, Akal College of Agriculture, Eternal University, Baru Sahib (Sirmaur), Himachal Pradesh (2017-2020)
Member, Empowered Committee, Institute of Bioresources and Sustainable Development, Department of Biotechnology, Govt of India, Imphal (2016-2019)
Member, Food Safety Knowledge Assimilation Network (FSKAN), Food Safety and Standards Authority of India (FSSAI), Ministry of Health & Family Welfare, Govt. of India, New Delhi (2016-cont)
Adjunct Professor, MACFAST, Thiruvalla, Kerala (2016-2019)
Member, Program Advisory Committee- Life Sciences and Medical Sciences, International S&T Cooperation, DST, New Delhi (2016-2021)
Academecian, European Academy of Sciences & Arts, Salzburg, Germany (2016-cont)
Member, Advisory Board, Biotech Express (2016-cont)
Subject Editor- Proceeedings of National Academy of Sciences (India): Part B- Biological Sciences(2016-cont)
Member, Advisory Board, TERI Higher Education Program (September 2015-August 2017)
Member, Academic Council, MACFAST (www.macfast.org), Thiruvalla (2015-cont)
Member, Scientific Advisory Committee, Institute of Bioresource and Sustainable Development, Imphal (2015-2018)
Co-chairman, DBT New Delhi, Task Force on Biosystemsand Bioprocessing Engineering (2014-2019)
Coordinator, Indo-Sweden Workshop on Biomass-based Bioeconomy, Stockholm (2014)
Member, DST Expert Committee on Chemical and Engineering Sciences- International Programs (2014-cont)
Member, DST, New Delhi, Expert Committee on Woman Scientists Scheme-A (WOS-A) (2013-2015)
Member, DST, New Delhi, Expert Advisory Group on Industrial/Analytical Instrumentation-IDP (2013-2016)
Member, DST New Delhi, Expert Committee for Science of Equity, Empowerment and Development of Society (SEED) (2013-2016)
Coordinator, CSIR network project on FUNHEALTH under XII FYP (2012-2017)
Member, Composite Evaluation Committee-International Collaboration Programs, DST, New Delhi (2012-2015)
Vice-chairman, DBT, New Delhi Task Force on Bioprocess and Products Development (2012-2016)
Member, Research Advisory Committee, Pushpsgiri Inst of Medical Science & Research, Thiruvalla (2010-2013)
Member, Scientific Advisory Committee, Evolva Ltd, Hyderabad (2010-2012)
Member, Research Advisory Committee (Alternate Energy), Indian Oil Corporation (2010)
Member, Advisory Board (Academic-Life Sciences), The Energy and Resource Institute, New Delhi (2009-2015)
Member, Core Expert Group on second generation biofuels, Ministry of New & Renewable Energy, New Delhi (2009-2016)
Member, DST, New Delhi Task Force on Expert Advisory Group on Analytical Instrumentation, Sensors & Allied Instrumentation and Industrial Instrumentation (2009-2012)
Member, Advisory Board, Bioscience Research Institute, Chennai (2009-2012)
Coordinator, CSIR network projects on enzymes under NWP 006 program on Exploration of India’s Rich
Microbial Diversity (2008-2012)
Member, Advisory Committee, SCMS Institute of Bioscience and Biotechnology R&D, Cochin (2008-2011)
Member, DBT Task Force on Bioprocess and Products Development (2008-2011)
Member, CSIR Committee on International Affairs, New Delhi (2008)
Member, Research Board, Kalaslingam University, Krishnan Koil, Tamil Nadu (2007-2015)
Member, Board of Management, Kalaslingam University, Krishnan Koil, Tamil Nadu (2007-2011)
Member, Scientific Advisory Committee, International Institute of Biotechnology and Toxicology, Padappai, Kanchipuram (2006-2009)
Member, Faculty of Applied Science, University of Kerala (2005-2009)
Member, Board of Studies in Biotechnology (PG), University of Kerala (2005-2009)
Member, Board of Futuristic Studies, University of Kerala (2005-2009)
Member, Institutional Biosafety Committees, CTCRI, Trivandrum (2003-2011)
Member, Institutional Biosafety Committees RGCB, Trivandrum (2003-2008)
Chairman, TIFAC Project Monitoring Committee, DST, New Delhi (2003-2006)
Member, DBT Task Force on Food Biotechnology (2003-2006)
Member, Kerala Biodiversity Committee (2002)
Member, DBT Overseas Associate Selection Committee (2002)
Member, Kerala Biotech Park Task Force (2000)
Expert Member, TIFAC, Dept of Science and Technology, New Delhi (1995)
Member, Faculty of Science, Cochin University of Science & Technology (1994-98)
Safety Officer, Regional Research Laboratory, Trivandrum (1993-1998, 2002-2004)
Convener, RRL-CUSAT Research Committee (1992-1998)
Member, Indo-Swedish DBT Review Committee for grants (1996)
Head, Biotechnology Division 1997-2015; Head, Biotechnology Unit (1992-1997)
Member, Committee on Garbage Disposal from Trivandrum City, Kerala Govt (1991)
Member, High Level Committee on Tapioca Alcohol, Govt of Kerala (1989-91)