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

Exceptional in execution and impact

About Proofpoint 

At 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. In this role, you’ll shape incident response strategy, push forward advanced threat detection and defense capabilities, and take point on the most complex security investigations across the enterprise. 

As a Staff-level engineer, you will operate as a subject matter expert and technical leader, partnering across SOC, Threat Intelligence, Detection Engineering, and Security Engineering to improve Proofpoint’s ability to detect, respond to, and proactively hunt advanced threats. 
 
This role includes participation in a 24/7 on-call incident response rotation. 

Location: This is a hybrid role based in our Draper, UT or Sunnyvale, CA office 4 days a week.

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