Tadj Oreszczyn FCIBSE, PhD, CEng is Professor of Energy and Environment at the UCL Energy Institute.  Tadj was founding Director of the UCL Energy Institute and established the RCUK Centre for Energy Epidemiology.  Tadj currently leads the building theme for the UK Centre for Research in Energy Demand Solutions and is Principle Investigator of the research council Smart Energy Research Lab.

Tadj has, for 34 years, undertaken energy and building research with a particular focus around the performance gap between theory and practice and the unintended consequences (health, comfort, etc.) of building energy efficiency. His first degree was in Applied Physics followed by a PhD in Solar Energy.