Rosen has served as Meta’s Chief Information Security Officer (CISO) since 2022, leading the company’s cybersecurity and information security systems across the organization. Before that, he was Vice President of Product, where he headed safety efforts and was responsible for preventing misuse across Meta’s platforms. Earlier in his career at the company, he led global growth initiatives. Over the past year, he also helped drive the integration of AI tools into Meta’s internal workflows.
Guy Rosen, 46, returned to Israel in recent years with his wife and two daughters after about a decade in the United States. In 2009, he co-founded Onavo with Roi Tiger. The two met during their military service in Unit 8200 and later worked together at Dov Moran’s startup Modu. Onavo, which was acquired by Facebook in 2013 after gaining millions of users, became the foundation for Meta’s research and development center in Israel, which now employs hundreds of people.
In a message to employees, Rosen wrote: “We faced challenges that no one in the industry or the world had solved. Looking back on more than a decade here, this was the most meaningful work of my career. This is the hardest part of saying goodbye. I look around at colleagues, friends, who lifted me up and from whom I learned everything. I know our important work will be in good hands, because I had the privilege of seeing up close how people I admired became people I learned from.”
He also thanked Meta Chief Operating Officer Javier Olivan, “who flew to Israel 13 years ago and believed in our small Israeli startup,” and Naomi Gleit, Meta’s head of product, “who supported my career here and from whom I learned almost everything I know.” He added that he is grateful to Mark Zuckerberg, “who trusted me with some of our most consequential work and who ultimately makes this place what it is."