Sisir Mitra worked at the Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal, India from 1980 until 2014. He served as Head, Department of Fruits and Orchard Management (1996-2000), Dean, Faculty of Horticulture (2007-2009) and Dean, Post Graduate Studies (2009-2012). Dr Mitra did his post doctoral research (1985-1986) at the Horticulture Research International, East Malling, UK as Commonwealth Fellow and worked as visiting Professor at the Institute Coltivazoni Arboree, Italy (1990), and University of Lavras, Brazil (2016).
He has published 252 scientific papers, 74 popular articles, 11 books, 1 IBPGR Descriptors and 28 technical reports. He has developed one coconut variety (Kalpa Mitra), two mango (Himsagar-HT 10 and Langra-LT 64 ), and three Jackfruit ( Jt-1, JT 39 and JT 40) clones.
Dr Mitra is presently serving as Board Member responsible for publications of ISHS, Science Editor, ISHS and Editor-in-Chief, Fruits: The International Journal of Tropical and Subtropical Horticulture. He is also the Chairman, Editorial Advisory Board of Acta Horticulturae and Chronica Horticulturae. He also serves as Chairman, Working Group on Avocado, and Jackfruit and other Moraceae.
Previously he was Chairman,Tropical and Subtropical Fruits.