Senior Professor of Micropaleontology and Paleoceanography at the Department of Geology, Banaras Hindu University (BHU), India

Professor at the School of Geosciences, University of Edinburgh.

Professor at Gauhati University, India.

Professor in the Department of Earth and Environmental Sciences at Columbia University, USA.

Professor of Micropalaeontology at University College London, UK.

Senior Researcher at MARUM at the University of Bremen, Germany.

Senior researcher at GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel, Germany

Anniversary Fellow at the University of Southampton, UK.

Researcher at the Centre Nationale de Recherche Scientifique (CNRS), France.

Assistant Professor at North Carolina State University, USA.

Assistant Professor in the School for the Environment at the University of Massachusetts Boston, USA.

Associate Professor at the Physical Research Laboratory (PRL), Ahmedabad, India.