Samuel Niza is founder and CEO of Circular - Consultoria em Sustentabilidade and has large experience in coordinating and authoring environmental and energy assessment studies and projects, namely of Life Cycle Assessment and Sustainable Resource Management.Niza is also member of the IN+ Center for Innovation, Technology and Policy Research (http://in3.dem.ist.utl.pt/).Until 2018 was faculty member of the Sustainable Energy Systems (SES) PhD programme of the MIT Portugal Program (http://www.mitportugal.org/programs/sustainable-energy-systems.html), Coordinator of the Urban Metabolism and Sustainable Cities research programme of IN+ (www.umsc.pt) and teaching assistant of the Industrial Ecology course at IST.Niza graduated in Environmental Engineering at the New University of Lisbon (1998), and started his research (1999) at the Centre for Sustainable Business Development of INETI. In 2002, Niza started his PhD where he developed the assessment of the biophysical structure (metabolism) of the Portuguese economy.As a result of the research line followed, S Niza has designed the Urban Metabolism and Sustainable Cities research programme of IN+.