Marina Walker Guevara is a Pulitzer Prize-winning investigative journalist and John S. Knight fellow 2019 at Stanford University. She is executive editor at the Pulitzer Center on Crisis Reporting, a non-profit that partners with journalists and newsrooms to support in-depth reporting on critical global issues.

Walker Guevara held leadership positions at the International Consortium of Investigative Journalists, a network of reporters in 90+ countries who collaborate on stories of global concern. She managed two of the largest collaborations of reporters in journalism history: The Panama Papers and the Paradise Papers, which involved hundreds of journalists using technology to unravel stories of public interest from terabytes of leaked financial data.

Walker Guevara was instrumental in developing ICIJ’s model of large-scale media collaboration, persuading reporters who used to compete with one another instead to work together, share resources and amplify their reach and impact.

She was a John S. Knight fellow at Stanford (2018-2019). During her fellowship, she focused on the use of artificial intelligence in big data journalistic investigations. That same year, she received the Missouri Honor Medal for Distinguished Service from her alma mater, the Missouri School of Journalism.

Walker Guevara sits on the board of directors of the Global Investigative Journalism Network (GIJN) and is a co-founder of the Latin American Center for Investigative Journalism (CLIP).