Santiago Lyon is the Head of Advocacy and Education for the Adobe-led Content Authenticity Initiative, working to combat misinformation through digital content provenance. He has more than 35 years of experience in photography as an award-winning photojournalist, photo editor, media executive and educator. As a photographer for Reuters and the Associated Press he won multiple photojournalism awards for his coverage of conflicts around the globe between 1989-1999.

In 2003/2004 he was a Nieman Fellow in journalism at Harvard University before being named VP/Director of Photography at the Associated Press, a position he held until 2016. Under his direction the AP won three Pulitzer Prizes for photography as well as multiple other major photojournalism awards around the world. He was Chair of the Jury for the 2013 World Press Photo contest. Lyon serves on the board of directors of the Eddie Adams Workshop and the advisory board of the VII Foundation. He also teaches regularly at the International Center of Photography in New York.