The celebration of the 50th anniversary of the SD Society could not offer a better set up for launching the first roundtable of the Special Interest Group on Energy. Energy has been a topic of interest within the SD society since the early days. A large number of issues have been addressed: from national energy planning to strategic intents in markets, from gas to power, and from renewable to fossil sources. Applications have been multidirectional, multidisciplinary and across large number of countries worldwide in topics such as transport, industry efficiency and household preferences. The Roundtable will focus on opportunities for SD research and intervention in energy security, energy markets, energy and the environment and energy for the poor and sustainability. This will be a special event for practitioners, consultants and representatives of the academic community to meet and share ideas.