Associate Professor at the Technical University of Denmark; Past President of the International Society of Indoor Air Quality and Climate; Past Chair of ASHRAE Environmental Health Committee; current Chair of the Position Document Committee; Vice President of Indoor Air 2008 Conference; President of Academy of Fellows of ISIAQ (Academy of Indoor Air Sciences); Deputy Director of the International Centre for Indoor Environment and Energy. Indoor climate researcher, expert and advisor; Teacher at undergraduate, graduate and Ph.D. courses; Supervisor of Ph.D. and M.Sc. projects. His research has influenced development of indoor air sciences in many aspects most dominantly through his studies on the effects of indoor environment on office work by adults and on schoolwork by children, and understanding the impact of air quality on human well-being. He carried out multiple laboratory chamber experiments with human subjects (equivalent to >5,000 subject hours) and field experiments (in >100 buildings). Has got experience in several measuring techniques involving measurements of physico-chemical parameters, subjective ratings of building occupants, physiological responses, and cognitive performance and sleep quality. He has got management experience by leading national and international research projects, international committees, and by sitting on the Board of Directors and Advisory Boards. Organized national and international conferences and courses.