International energy policy expert. Former: Principal Energy Adviser, UNIDO; Manager, UN-Energy; helped shape the United Nations Sustainable Energy for All initiative; Chief of Cabinet for the Minister of Energy of Ireland; Lead Climate Change Negotiator for the EU on low-carbon technology. Currently: Deputy Director, Joint Institute for Strategic Energy Analysis, NREL. Holds senior research affiliations at Cambridge University, the Global Green Growth Institute, Columbia University, and IIASA. Author of: Analytical Methods for Energy Diversity and Security.