Jill Jager has worked as a consultant on energy, environment, and climate for numerous national and international organizations and has an extensive publication record. She was Deputy Director of the International Institute for Applied Systems Analysis (1994-1998) and Executive Director of the International Human Dimensions Programme on Global Environmental Change (1999-2002). She was a member of the Core Group of the EU-funded MATISSE (Methods and Tools for Integrated Sustainability Assessment) project (2005-2008).