Founder, Borjoner International; Global Advisor, Centre for Urban Health and Development (CUHD-AIPA), MD, USA.

Director, Health Services Research; Global Health, Population and Nutrition; FHI 360, NC, USA

Director, Bixby Center for Population, Health and Sustainability; University of California at Berkeley, USA
Technical Director, Research for Scalable Solutions (R4S)

Emeritus Professor, Department of Population Health, London School of Hygiene & Tropical Medicine, UK

Vice-Chancellor, University of Medical Sciences, Ondo, Nigeria

Dept. of Community Medicine, University of Ibadan, Nigeria