Sam Gregory is a human rights advocate, trainer and producer who helps people use the power of the moving image and participatory technologies to create human rights change. Currently the Program Director at WITNESS running its 'Cameras Everywhere' initiative - on empowering milllions of people to use video effectively and ethically - and an Adjunct Lecturer in Public Policy at the Harvard Kennedy School. On the Board of the US Campaign for Burma, and Advisory Board of Games for Change. In 2010, a Rockefeller Bellagio Resident on the future of video-based advocacy.

WITNESS (www.witness.org) is the global pioneer in using video to expose human rights abuses, empowering people to transform personal stories of abuse into powerful tools for justice, promoting public engagement and policy change. Founded in 1992, WITNESS has partnered with human rights groups in over 80 countries, trained over 3,000 human rights defenders, developed key tools for using video online, and supported the inclusion of video in over 100 campaigns, increasing their visibility and impact. Today, WITNESS focuses on intense campaigning partnerships on five continents, on sharing best practices with the growing number of people using video-for-change, and on improving the ability of the millions of citizens turning their cameras on abuse to do so safety, ethically and effectively.