Gillian Caldwell was born in New York City, USA. She holds a bachelor of arts degree from Harvard University and a juris doctor degree from Georgetown University Law Center. As executive director of WITNESS, which trains and supports people using video in their fight for human rights, Caldwell helped produce over thirty documentary shorts and films. She was campaign director for the United States 1Sky climate and energy campaign. Caldwell is chief executive officer of Global Witness, a not-for-profit that exposes the hidden links between demand for natural resources, corruption, armed conflict and environmental destruction.