Meet Our Team

Dr. Camille François is the founding president of ROOST (Robust Open Online Safety Tools) and a professor of practice at Columbia University’s School of International and Public Affairs.

She has held senior trust and safety and research roles across social media, cybersecurity, and gaming—including Principal Researcher at Google, Senior Director at Niantic, and Chief Innovation Officer at Graphika. She is known for building high-performing teams to detect and mitigate online harms at scale, from child safety to violent extremism, and her research has helped shape safety practices across major Silicon Valley platforms.

Her public interest work includes investigating information operations for the U.S. Senate Select Intelligence Committee, leading France’s governmental inquiry into immersive technologies, and being appointed by President Emmanuel Macron to co-chair the national consultative assembly on the future of the information society. Her current research focuses on public interest AI and new open source practices.

Recognized by TIME’s “100 Next,” MIT Tech Review’s “35 Under 35,” Fast Company’s “Most Innovative Companies,” and the World Economic Forum, she is also a Fulbright Scholar and a Young Leader of the French-American Foundation. She is affiliated with the Harvard Berkman-Klein Center and the French Institute of Geopolitics, and her work has been featured in The New York Times, The Washington Post, WIRED, and Le Monde.

Anne Bertucio is the Chief Operating Officer of ROOST (Robust Open Online Safety Tools), where she leads operations and strategy to advance a commons of open source safety technology. Her career has centered on the intersection of technology and societal progress—a focus that led her to open source software as a force for transparency and collaboration.

Prior to joining ROOST, Anne led Google’s Open Source Programs Office, where she oversaw the release and support of Google’s open source projects and championed programs that improved the long-term sustainability of open source ecosystems. Her work emphasized security and privacy, including authoring and publishing Google’s coordinated vulnerability disclosure (CVD) policy—a framework that later informed policies for the Cloud Native Computing Foundation and the Open Source Security Foundation.

Anne brings a multidisciplinary perspective to her leadership, grounded in training in policy and ethics and experience spanning government relations, community management, and both the nonprofit and private sectors.

Juliet Shen is the founding Head of Product at ROOST (Robust Open Online Safety Tools), where she leads the development of scalable technologies that protect people online while preserving user privacy. She was instrumental in incubating ROOST within Columbia University’s Trust and Safety Tools Consortium and now oversees its product vision and implementation.

Over the past decade, Juliet has shaped trust and safety practices across some of the world’s most widely used platforms. She served as Snapchat’s first Trust and Safety Product Manager, helping establish its foundational moderation systems; led the Trust and Safety product team at Grindr; and deployed advanced AI at Google to detect and prevent abuse across Workspace platforms at scale.

Juliet has also been a driving force behind industry collaboration. She co-chaired the Tech Innovation Working Group at the Technology Coalition, where she helped launch Project Lantern—the first-ever cross-platform child safety signal-sharing program—and currently co-chairs the Tools Research Committee at the Trust and Safety Foundation. She holds Bachelor’s degrees in Political Science and Sociology from the University at Albany.

Cassidy is the OSS Community Manager of ROOST (Robust Open Online Safety Tools), where he leads the growth and engagement of an online safety contributor community at the intersection of open source development and online safety. He has spent 15 years building community around open source projects with a focus on both technical and social issues. Throughout his career and alongside his community building, Cassidy has worn many hats including developer advocate, partner success engineer, user experience architect, and front-end web developer; he draws from his varied experience to bridge domains and support community members wherever needed.

Cassidy has been a successful advocate for cooperation across open source projects: in the Linux desktop community, he has helped define, coordinate, and standardize multiple cross-desktop specifications that have been widely adopted across competing desktop environments and operating systems. He currently serves as secretary on the GNOME Foundation board of directors.

Jeremie Ponak leads Special Projects at ROOST (Robust Open Online Safety Tools), where he works at the intersection of strategic partnership development, technical program delivery, and organizational funding. He has nearly a decade of experience building and scaling products in startup environments and bridging the worlds of technology and public service.

Jeremie holds a Master of Public Administration from Columbia University’s School of International and Public Affairs (SIPA). At Columbia, he cofounded the University’s chapter of All Tech Is Human, led policy and advocacy initiatives in the online safety space through his work with Mothers Against Media Addiction, and conducted research on public broadcasting law’s applicability towards social media.

Mariana Valle is Marketing Manager at ROOST (Robust Open Online Safety Tools), where she leads content and strategy to bring open-source online safety tools to those who need them. She has eight years of experience in strategic communications and marketing for mission-driven organizations, from large nonprofits to startups, across education, climate, youth, media, and technology.

A former nonprofit founder, she works at the intersection of marketing, narrative, and social impact, translating complex policy and tech ideas into stories people understand and care about. Mariana holds a Master of Public Administration from Columbia University’s School of International and Public Affairs (SIPA), where she focused on tech policy, trust and safety, and internet and AI governance.

Selena is a Product Manager at ROOST (Robust Open Online Safety Tools), where she drives the safety and integrity of the company’s core products. With 8 years of Trust & Safety experience spanning product management, technical program management, operations, and content review, she brings a holistic view to platform defense. Selena specializes in translating complex data into user-focused safety tools and is deeply passionate about making digital safety both accessible and adaptable to evolving threats.

Mark Reitblatt is the Engineering Team Lead of ROOST (Robust Open Online Safety Tools), where he supports the development of Osprey and Coop, ROOST’s open source tools for detecting, reviewing, and acting on online harms. He oversees day-to-day engineering and the technical roadmap, and works closely with the platforms that run and contribute to these tools.

Mark spent a decade at Meta working on trust and safety and crisis response. While there, he built the crisis response teams and tooling that supported elections in the US and around the world. In 2024 he was Meta’s engineering lead for election integrity. More recently, he led the Incident Response (SEV) program for the Integrity org.

Mark holds a Ph.D. and M.S. in Computer Science from Cornell University and B.S. degrees in Computer Science and Mathematics from the University of Texas at Austin.

Emma is a Staff Software Engineer at ROOST (Robust Open Online Safety Tools), where she works across ROOST’s suite of open source safety tools. She has spent more than 13 years building software for online safety, education, healthcare, and enterprise technology, with a focus on scalable architecture and strong engineering teams. Having served as a staff engineer, engineering manager, technical lead, and mentor, Emma moves easily between hands-on technical work and leadership, setting technical direction and helping teams ship high-quality software.

Emma’s experience spans both open source and online safety. At edX, she managed the team behind the business-critical payments system of the open source Open edX platform, shipping features that increased revenue by millions of dollars. At Thorn, a nonprofit that builds technology to defend children from sexual abuse, she was the engineering subject matter expert for three product lines and led the integration work for a rewrite from a monolith to microservices. At ROOST, she brings these threads together, helping build open source tools that make online safety accessible to organizations of every size.