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Principal Threat Researcher

Zscaler

Bellevue · Remote · San Jose · Santa Clara · USD 171,500-245,000 · 12+ years experience · Posted Oct 1, 2026

At a glance

Experience
12+ years experience
Location
Bellevue · Remote · San Jose · Santa Clara
Salary
USD 171,500-245,000 · Base salary

About the role

  • The Principal Threat Researcher serves as a subject matter expert on adversary behavior across endpoint and cloud environments.
  • This role involves dissecting and replicating sophisticated cyber attack techniques to develop scalable detection recommendations.
  • The researcher will influence product strategy and engineering efforts to ensure industry-leading protection for customers.

Responsibilities

  • Scope and refine research initiatives applying an adversarial mindset to emerging attack techniques.
  • Analyze detection data sources across operating systems and major Cloud/SaaS providers.
  • Dive into technical components and detection optics to understand adversary manipulation of techniques.
  • Engineer automated attack code and develop proofs of concept for new detections.
  • Validate threat coverage by writing test code.
  • Collaborate with detection engineers, intelligence analysts, and threat hunters to prioritize deliverables.
  • Document and present research findings to internal and external audiences.
  • Serve as a technical mentor for junior team members.

Requirements

  • 12+ years of experience conducting security research with actionable outcomes.
  • Foundational understanding of AI/ML technologies and experience leveraging or securing AI-driven solutions.
  • Extensive security expertise in at least one operating system (Windows, macOS, or Linux).
  • Experience working with commercial Endpoint Detection & Response (EDR) platforms.
  • Security experience in at least one cloud service provider (AWS, GCP, or Azure) and cloud-based detection platforms.
  • Software development experience in at least one scripting language (e.g., PowerShell, Python).
  • Software development experience in at least one compiled/assembled language (e.g., C, C++, Rust, Go).
  • Experience managing code with version control systems like git/GitHub.

Preferred qualifications

  • Proven ability to leverage AI technologies and workflows to drive measurable operational efficiency.
  • Established record of public community engagement, such as conference talks, technical blog posts, or webinars.
  • Prior experience developing relationships with security vendors to drive product enhancements.
  • Experience building attack technique automation frameworks.

Benefits

  • Various health plans
  • Time off plans for vacation and sick time
  • Parental leave options
  • Retirement options
  • Education reimbursement
  • In-office perks

Workplace

  • This is a remote role.
  • Zscaler utilizes a hybrid working model.

Skills

  • Windows
  • macOS
  • Linux
  • AWS
  • GCP
  • Azure
  • PowerShell
  • Python
  • C
  • C++
  • Rust
  • Go
Show all 15 skills
  • Git
  • GitHub
  • EDR

Zscaler

Principal Threat Researcher

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