Staff Information Security Engineer - Threat Defense & Automation at Proofpoint

Staff Information Security Engineer - Threat Defense & Automation Location: Sunnyvale, CA; Draper, UT Country: United States of America Time type: Full time Job requisition ID: R14506 Posted: 2026-07-27 ### About Us Proofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools. Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint to stop threats, prevent data loss, and build resilience across their people and AI workflows. Our…