Designing sustainable energy policies heavily impacts the economic development, environmental resource management and social acceptance. There are four main steps in the policy making process: planning, environmental assessment, implementation and monitoring. We focus here on the first three steps that are performed ex-ante. We describe in this paper these steps tailored on the energy policy process. We also propose enabling technologies for implementing a decision support system for energy policy making. 978-3-9815370-0-0/DATE13/ c 2013 EDAA