Tord Kjellstrom has been a researcher and academic teacher over four decades, primarily in the environmental and occupational epidemiology fields, initially carrying out epidemiological studies of the effects of cadmium, lead, methyl-mercury, asbestos and children’s traffic accidents. At the World Health Organization (WHO), Kjellstrom developed scientific review work as well as training and research promotion in environmental health and chemical safety. He became director of an office with the responsibility of developing analysis and global guidance on climate change and health and other emerging topics. From 1998, in New Zealand, Kjellstrom continued research on health effects of air pollution, climate change, road transport, urban health, and globalization as well as the health links to sustainable development. Kjellstrom was (and remains) co-principal investigator in teams that have received substantial grants for these studies from sources in Sweden, USA, UK, New Zealand and Australia, including Health Research Council of New Zealand, Australian National Health and Medical Research Council and the Wellcome Trust. Recently, Kjellstrom has been co-principal investigator in several major research programs (“Capacity-building in Environmental Health”, ANU; “Training Program on Atmospheric Environment and Health”, ANU; “Health Transition Study in Thailand”, ANU; “Health Effects of Air Pollution in New Zealand”, New Zealand agencies; “Healthy Urban Systems”, ANU) and produced reports on globalization and public health (Swedish National Institute of Public Health), urban health equity (WHO Kobe Center), road transport and public health (Swedish National Road Authority), and climate change and health research priorities. Kjellstrom also been active in occupational health development programs in developing countries. Some were funded by the Swedish International Development Agency (SIDA) in Central America (SALTRA), Southern Africa (WHASA) and most recently (2012-2014) in India. In recent years, He has carried out work for the WHO on climate change and health, urban health, and health equity. Currently, Kjellstrom is expanding the program of studies on “High Occupational Temperature Health and Productivity Suppression (HOTHAPS)” on a global level to document impacts of climate change on occupational health and productivity. This program involves collaboration with institutions in Australia, Malaysia, Sweden, Norway, New Zealand, United Kingdom, China, Vietnam, Thailand, Nepal, India, South Africa, Nigeria, Costa Rica, Nicaragua, and USA. New cooperation with a large number of institutions in Europe is planned to start in 2016 under the heading HEAT-SHIELD, with a focus on increases in heat exposure levels in workplaces related to climate change and how to limit their negative impacts.