Nir Zuk is an Israeli-American entrepreneur and technology executive, born in 1971 in Israel. He developed an early interest in technology and served in the Israeli Defense Forces as an alumnus of Unit 8200, an elite intelligence unit specializing in cyber and signals intelligence, where he gained foundational experience in cybersecurity. After his military service, he earned a Bachelor of Science in Electrical Engineering from the Technion – Israel Institute of Technology in 1996. Zuk began his career at Check Point Software Technologies, where he joined as a software engineer in 1993 and rose to become a director and key architect of the company's pioneering firewall technology, contributing significantly to its early success as a global leader in network security. In 2002, he joined Juniper Networks as the founder of its security division, focusing on application-level security. Frustrated with the limitations of existing solutions, Zuk left in 2005 to co-found Palo Alto Networks, pioneering next-generation firewalls that inspect traffic at the application layer and integrate application, user, and content visibility, revolutionizing the cybersecurity industry.

Under Zuk's leadership as CEO since 2005, Palo Alto Networks has grown into a global leader in cybersecurity, going public in 2012 and achieving a market capitalization exceeding $100 billion as of recent years. The company has become a dominant player in cloud security, endpoint protection, and threat intelligence, acquiring numerous firms including Cyvera in 2014 and Demisto in 2019 to expand its portfolio in endpoint protection and security orchestration. Zuk's innovations focused on application-level security and machine learning-driven threat detection, moving beyond traditional port-based security models, have been credited with shifting the industry toward more intelligent, threat-focused defenses.

Zuk holds dual Israeli-American citizenship and resides primarily in the United States. His influence extends through professional networks in Israel's tech ecosystem, particularly alumni of Unit 8200, many of whom have founded successful startups, drawing attention to the 'Israeli cybersecurity mafia.' He has testified before the United States House Committee on Homeland Security and lobbied the US Congress on cybersecurity matters, reflecting his influence in policy circles. He maintains ties to Israeli defense entities, consulting for the Israel Ministry of Defense. His work has earned him profiles in major media outlets like Forbes, CNBC, and The Wall Street Journal, and recognition as a cybersecurity pioneer. While no major legal controversies are documented for Zuk personally, Palo Alto Networks has faced civil litigation, including patent challenges from competitors like Cisco Systems. Zuk's professional relationships include partnerships with figures like Yuming Mao and adversarial dynamics with former colleagues such as Shlomo Kramer and Check Point Software Technologies, stemming from competitive innovations in the field. His wealth stems primarily from his stake in Palo Alto Networks, with clients including the U.S. Department of Defense and Department of Homeland Security. Allegations of undisclosed business ties, such as with Eyal Waldman, and acquisitions like Cyvera and Demisto, underscore his expansive network.