The organizations in this feature are among the most recognizable in the world. Their security programs operate at a scale that most enterprises will never approach, protecting billions of customer records, trillions in financial assets, global supply chains, and the technology infrastructure that hundreds of millions of people depend on every day. The cybersecurity leaders responsible for those programs have built careers across government intelligence, defense contracting, cloud computing, and enterprise technology, and what they share is the particular discipline required to lead security when the stakes are measured in global impact.
David Reber — Chief Security Officer and Head of Product Security, NVIDIA
David Reber has served as CSO and head of product security at NVIDIA since August 2022, overseeing security for a company whose chips and AI platforms have become critical infrastructure for industries ranging from data centers and autonomous vehicles to defense and scientific research. He joined NVIDIA in January 2020 as senior director of software product security before stepping into the CSO role. Before NVIDIA, he spent nearly eighteen months as director and senior director of cyber security at Nutanix, and before that led security and solutions for Frame’s public sector division. His foundational career spans nearly eleven years in the US government in security engineer, information system security manager, and cyber security manager roles, giving him a classified systems and federal security background that directly informs how he now approaches product security at one of the most strategically important technology companies in the world. He also serves as chairperson of NVIDIA Public Sector.
George Stathakopoulos — Vice President of Corporate Information Security, Apple
George Stathakopoulos has led corporate information security at Apple since March 2016, overseeing security for a company whose ecosystem spans more than two billion active devices globally. Before Apple, he spent six years as VP of information security at Amazon, and before that nearly eighteen years at Microsoft, progressing from engineer through general manager of product security across one of the most consequential periods in enterprise software security history. He serves on the IT advisory board of the United Nations World Food Programme and served as advisor to CISA’s Cybersecurity Advisory Committee from December 2021 through January 2025, contributing to national cybersecurity strategy alongside his corporate security responsibilities. That career spanning Microsoft, Amazon, and Apple, three of the most influential technology companies ever built, reflects a security leader whose institutional knowledge of how consumer technology security works at the highest level is unmatched in the industry.
Stephen Schmidt — Chief Security Officer, Amazon
Stephen Schmidt has spent more than eighteen years at Amazon, serving as CISO of AWS from 2010 through 2022 before stepping into the broader CSO role for the entire Amazon enterprise. Before Amazon, he spent ten years as a section chief at the Federal Bureau of Investigation, a background that shaped how he approaches threat intelligence, incident response, and the intersection of corporate security with law enforcement and national security. He has also served for more than twenty-five years as assistant chief of operations at the Sterling Volunteer Rescue Squad, a community commitment that runs alongside his entire corporate security career. His tenure building and leading AWS security during the period when cloud computing became the dominant enterprise infrastructure model gave him a front-row seat, and primary accountability, for one of the most consequential security challenges in technology history.
Sean Oldham — Chief Information Security Officer, Broadcom
Sean Oldham has served as CISO at Broadcom since November 2013, a tenure of more than twelve years that spans the company’s transformation into one of the world’s largest semiconductor and infrastructure software companies. He held the information security officer role at Avago Technologies during the period leading to its acquisition of Broadcom in 2016, and has continued in the CISO seat through successive acquisitions including CA Technologies and Symantec’s enterprise security business. Before Broadcom, he spent nearly fifteen years at Agilent Technologies as a program manager and before that nearly a decade at HP in business controls. That sustained institutional tenure across more than a decade of transformative M&A activity reflects a security leader who has had to integrate and secure acquired enterprises repeatedly while maintaining continuity across a company whose product portfolio and scale have changed dramatically.
Guy Rosen — Vice President, Product Management and Chief Information Security Officer, Meta
Guy Rosen has been at Meta since 2013, when the company acquired Onavo, the mobile analytics company he co-founded and led as CEO. His career at Meta has moved through product director and VP roles leading internet.org, growth, integrity, and security before adding the CISO title to his current mandate covering internal AI, enterprise engineering, and security. His background is product leadership first, with a growing security remit that reflects how Meta has chosen to integrate integrity, safety, and security into a unified product and operational function. Before founding Onavo, he spent two and a half years as an analyst at Blue Security working on anti-spam operations. His profile is unusual among the leaders in this feature precisely because it reflects a company that has consciously blended product thinking with security accountability at the most senior level.
Jerry Geisler — Executive Vice President and Global Chief Information Security Officer, Walmart
Jerry Geisler has spent more than thirty-five years at Walmart, beginning his career as a cashier in his hometown store before building one of the most comprehensive corporate security programs in global retail. His responsibilities span data security for millions of customers and associates, security strategy, engineering, services, testing and assessment, SOC, cyber intelligence, forensics, eDiscovery, risk management, vulnerability management, and PCI, SOX, and HIPAA compliance across the global enterprise. Under his leadership, Walmart’s forensics and eDiscovery lab achieved ISO 17025 ASCLD accreditation, making it one of fewer than thirty private forensic laboratories to meet the same rigorous standards as federal laboratories, and the first lab ever to accredit the eDiscovery discipline. He served in the United States Marine Corps and has served as adjunct professor of strategic management and leadership at John Brown University’s graduate business program for a decade. He sits on the board of Team8, a cybersecurity incubator and venture capital fund, and on the board of Mercy health system. That career, from store cashier to EVP and global CISO at the world’s largest retailer over thirty-five years, is one of the more remarkable professional arcs in corporate security leadership.
Pat Opet — Global Chief Information Security Officer, JPMorgan Chase
Pat Opet has spent nearly twelve years at JPMorgan Chase, progressing from computer engineer through executive director, managing director and head of technology for cybersecurity and technology controls, managing director and distinguished engineer and deputy CISO, and stepping into the global CISO role in June 2021. Before JPMorgan, he spent nine years at Lockheed Martin across computer engineering, program management for strategic warfighter enterprise programs, technical assistant to the VP of engineering, and program management for global cyber security solutions. That defense contractor and engineering foundation, built across classified programs at one of the nation’s largest defense companies, directly informs how he approaches security governance at a financial institution that spends more than six hundred million dollars annually on cybersecurity and operates one of the most closely watched security programs in the global financial system. He served on the board of directors of ReversingLabs for nearly six years.
What Separates Security at This Scale
The leaders in this feature are not simply managing large security teams. They are setting the conditions under which hundreds of millions of people interact with technology, financial services, and retail infrastructure every day. A decision made in one of these security programs can have downstream effects that reach into governments, supply chains, and the daily lives of people who have never heard the name of the security leader responsible. That weight shapes how these programs are built, how these leaders communicate with boards and regulators, and what it means to get security right at the scale that America’s largest companies demand.
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