Gillian Caldwell
chief executive officer, Skoll Awardee Global Witness; co-editor, Video for Change: a guide to advocacy and activism

Gillian Caldwell has been the CEO of Skoll Awardee Global Witness since 2015. She is a dynamic and award-winning three-time executive director, campaigner, serial social entrepreneur, attorney, author and filmmaker.

In 2010, Gillian completed three years as campaign director for the United States 1Sky campaign (now merged with, which she helped build from inception. From start up under her leadership, 1Sky grew within two years to become the largest collaborative climate and energy campaign in the United States.

Prior to launching the 1Sky campaign, Gillian served as the executive director of WITNESS, which was co-founded by British musician Peter Gabriel and uses the power of video to open the eyes of the world to human rights abuses. Before her 10 years of leadership at WITNESS, Gillian directed a global undercover investigation and global campaign on the Russian mafia’s involvement in trafficking women for forced prostitution, and produced and directed an influential documentary film which was televised internationally and helped spur policy changes worldwide.

Gillian is also co-editor and author of a book titled Video for Change: A Guide to Advocacy and Activism (Pluto Press, 2005). She received her BA from Harvard University and a J.D. from Georgetown University, where she was recognised as a Public Interest Law Scholar.

Follow Gillian on Twitter: @GBCaldwell