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Principal Active Defense Engineer

Workday

Reston, VA · Lead / Staff / Principal

$167,200 – $300,000

Listed on Workday’s own careers site. You apply with them directly — we never stand between you and the employer.

What this role is

A senior technical leadership role in cybersecurity focused on building and operating threat detection systems at scale. This position suits experienced software or security engineers who want to set technical direction and mentor others without formal management responsibilities.

Our summary, not Workday’s wording. The full posting is on their site.

Skills this role names

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What they ask for

Required

  • 10+ years in software, platform, or security engineering with significant production-scale detection or security work
  • Experience setting technical direction and leading complex multi-system initiatives as an individual contributor
  • Proficiency in a general-purpose programming language like Python, Java, Kotlin, Scala, or JavaScript for building detection logic and tooling
  • Experience architecting a detections-as-code pipeline, detection platform, or production data pipeline
  • Experience applying generative AI or AI agents to security engineering work
  • Experience with SIEM platforms such as Splunk and developing applications in public cloud environments

Nice to have

  • Automated testing, validation, and deployment experience for detection content
  • Experience translating threat intelligence and adversary techniques into detections
  • Knowledge of behavioral baselines, entity-level context, anomaly detection, or risk-based alerting
  • Cross-team technical leadership experience serving as subject matter expert for audits and compliance inquiries
  • Relevant certifications such as SANS or CISSP

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