Professional Experience (National): He has served as (i) Head-Department of Geography, Delhi University; (ii) Member, IUGG-IGU National Committee of the Indian National Science Academy (2008-15); (iii) Secretary General of the National Association of Geographers, India, (NAGI) (2001-11); (iv) Managing Editor of its Journal-Annals of NAGI; (v) Member, Study Group for Preparation of NCR Plan-2021; (vi) Member, ICAR Program on Indo-Gangetic Plains - Land use/Cover Change and Food Security; (vii) Nominated Member, Curriculum Development for Geo-informatics jointly nominated by UGC and Department of Space, Govt. of India; (viii) President, Geography Section, Indian Academy of Social Sciences; (ix) Ex-Provost, Gwyer Hall, University of Delhi; and (ix) Ex-Recorder-Indian Science Congress Association (ISCA).
