Cecil has almost 30 years of experience studying, teaching, and advising on aspects of urban forestry and nature-based solutions. He is widely considered as one of the world’s leading urban forestry experts, and his work has been featured by leading media outlets such as CNBC and in international documentary films. A Dutch national, he has lived and worked in Europe, Asia, and North America. He is an honorary professor of urban forestry at the University of British Columbia. Cecil helped found the leading academic journal Urban Forestry & Urban Greening, and edited seminal textbooks such as The Routledge Handbook of Urban Forestry. He is currently Editor-in-chief of Arboriculture and Urban Forestry, the scientific journal of the International Society of Arboriculture. Cecil is passionate about using trees and nature to develop better cities, and always stresses the importance of building meaningful relationships between people and places. He has advised international organisations such as the United Nations, as well as national and local governments in more than 30 countries, and was an invited panellist at the 8th Ministerial Conference on the Protection of Forests in Europe in April 2021. He was co-chair of the 1st World Forum on Urban Forestry, held in Mantova, Italy, and also chaired one of the days during the recent 2nd World Forum on Urban Forests in Washington DC. Cecil currently lives in Zeist, The Netherlands, from where he co-runs the Nature Based Solutions Institute, a think tank for the evidence-based greening of cities.