Veteran cybersecurity leader brings proven track record and strategic vision for integrated platform security
Sunnyvale, Calif.—June 23, 2025 – Proofpoint, Inc., a leading cybersecurity and compliance company, today announced the appointment of Tom Corn as executive vice president and general manager of its Threat Protection business, effective immediately.
A seasoned cybersecurity executive, Mr. Corn brings over two decades of leadership experience in cloud, infrastructure, and platform security to Proofpoint. In his role, he will be responsible for driving Proofpoint’s threat protection strategy, product innovation, and go-to-market execution, accelerating the company’s mission to protect people and defend data in today’s complex threat landscape.
Prior to joining Proofpoint, Mr. Corn co-founded a startup focused on securing agentic-AI applications. He previously served as chief product officer at Ontinue, where he helped shape the company’s AI-driven approach to managed extended detection and response (MXDR). He also held senior leadership positions at VMware and RSA, where he led major initiatives in cloud, endpoint, network, identity and data security product development, contributing to industry-leading advancements in cloud workload protection, micro-segmentation, and cyber risk analytics.
“We are delighted to welcome Tom to Proofpoint’s executive team,” said Sumit Dhawan, CEO of Proofpoint. “Tom’s deep expertise in cloud and infrastructure security, combined with his visionary thinking around integrated platforms and the evolving role of GenAI to security, will be instrumental as we continue to deliver the most comprehensive and effective threat protection solutions to our customers. His leadership comes at a pivotal time in our mission to define the future of human-centric security, as organizations seek smarter, more scalable ways to defend against today’s most advanced threats.”
“Proofpoint is uniquely positioned to lead human-centric security, and I’m excited to be part of a company that’s committed to innovation, customer impact, and a platform-centric approach,” said Tom Corn. “I look forward to working with this team to further build our market-leading threat protection capabilities and deliver meaningful security outcomes for our customers.”
Darren Lee, who previously led Proofpoint’s Threat Protection Group, will assume the newly created role of executive vice president of strategic projects, reporting directly to Proofpoint CEO Sumit Dhawan.
About Proofpoint, Inc.
Proofpoint, Inc. is a leading cybersecurity and compliance company that protects organizations’ greatest assets and biggest risks: their people. With an integrated suite of cloud-based solutions, Proofpoint helps companies around the world stop targeted threats, safeguard their data, and make their users more resilient against cyber attacks. Leading organizations of all sizes, including 85 percent of the Fortune 100, rely on Proofpoint for people-centric security and compliance solutions that mitigate their most critical risks across email, the cloud, social media, and the web. More information is available at www.proofpoint.com.