Staff Information Security Engineer - Threat Defense & Automation

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 mission is simple: safeguard the digital world and empower people to work securely and confidently. Join us in our pursuit to defend data and protect people.

How We Work

At Proofpoint, you’ll be part of a global team that breaks barriers to redefine cybersecurity guided by our BRAVE core values: Bold in how we dream and innovate, Responsive to feedback, challenges, and opportunities, Accountable for results and best in class outcomes, Visionary in future-focused problem-solving, and Exceptional in execution and impact.

About Proofpoint

We are committed to protecting organizations and individuals from cyber threats through innovative security solutions. Our mission is to safeguard customers from advanced threats, phishing attacks, and data breaches through cutting-edge technology and a global team of security experts. Role Overview: We’re seeking a Staff Information Security Engineer to help lead and evolve our Global Information Security Operation.

Key Responsibilities

• Serve as a Level 3 / Staff escalation point for high-severity incidents.
• Lead investigations into APTs, ransomware, insider threats, and cloud compromises.
• Act as incident commander and coordinate response efforts.
• Participate in 24/7 on-call incident response.
• Lead threat hunting across endpoint, network, identity, and cloud.
• Operationalize threat intelligence into detections and response.
• Design and improve detections across SIEM, EDR, and SOAR.
• Automate incident triage and response workflows.
• Drive post-incident reviews and continuous improvement.
• Mentor team members and influence security strategy.

Required Qualifications

• 12+ years in Incident Response, DFIR, Threat Hunting, or Security Operations.
• Deep expertise in incident response, threat hunting, and threat intelligence.
• Strong knowledge of MITRE ATT&CK and adversary TTPs.
• Experience with SIEM, EDR, SOAR, and cloud security.
• Scripting experience (Python, PowerShell, or Bash).
• Strong communication and leadership skills.
• US Citizen.

Preferred Qualifications

• Experience building threat hunting or detection programs.
• Background in threat intelligence or red/purple teaming.
• Certifications such as GCFA, GCIH, CISSP, CISM, OSCP.