Principal Product Security Engineer - Office of the CISO

Founded in 2017, Obsidian Security was created to close a critical gap: securing the SaaS applications where modern business happens—platforms like Microsoft 365, Salesforce, and hundreds more.    Backed by top investors including Greylock, Norwest Venture Partners, and IVP, we’ve built a complete SaaS security platform to reduce risk, detect and respond to threats, and prevent breaches at the source. Our team includes leaders who helped define the categories of endpoint and identity security at CrowdStrike, Okta, Cylance, and Carbon Black.    Now, we’re transforming how SaaS is secured—in the era of agentic AI.    Today, Obsidian is trusted by global enterprises like Snowflake, T-Mobile, and Pure Storage. We protect more than 200 organizations across North America, Europe, the Middle East, Southeast Asia, Australia, and New Zealand—including many of the world’s largest Fortune 1000 and Global 2000 companies.   With strong global momentum, a growing partner ecosystem including SentinelOne, Databricks, and Google Cloud, and a major fundraise on the horizon, we’re scaling quickly toward long-term growth and IPO readiness. Join us as we define the future of SaaS security!

Position Overview: We’re looking for a Principal Product Security Engineer to join our team and lead our product security to the next level and beyond. The ideal candidate for the strategic role is a senior, highly technical, passionate, team-oriented professional with a proven track record of excellence in technical product security engineering, leadership and execution. This role will be instrumental in shaping how security is integrated throughout the Obsidian SaaS product, hosting environments, and related services. 

The ideal person for this role must be mission and values-driven, must have an ownership mentality, and must put the well-being of our customers, our teammates, and our organization at the forefront of how they operate. This person must be able to operate and thrive in a dynamic, high-growth startup environment within an established Cybersecurity, GRC, and IT team and programs. This is a critical, high-impact role that will serve as a catalyst for growth for any seasoned cybersecurity professional.

The Principal Product Security Engineer reports to the Chief Information Security Officer and will be responsible for developing, implementing, optimizing, scaling, automating, and operating the Obsidian product security program. The Principal Product Security Engineer works closely with Engineering, Product, DevOps, GRC, and IT to support the company's product security needs. Candidates applying for this sensitive and high-impact role should be highly technical team leaders and operators with exceptional secure software engineering, automation, and application and infrastructure security experience, capable of implementing and operating application security, infrastructure protection, threat detection, and incident response capabilities and industry best practices across an organization with a cybersecurity mission and modern tech stack. This is a multi-faceted role within a fast-moving startup and will require the successful candidate to possess an ownership mentality, sound judgment, personal responsibility, and initiative.

Your Responsibilities Will Include

• Security Architecture and Technical Leadership
  • Provide technical leadership and guidance for the Security Team, mentor more junior security engineers.
  • Mentor engineers on secure design and coding practices, and influence cross-functional teams through technical thought leadership.
  • Ensure that the Product Security Program is properly defined and documented to include technical runbooks, standards, procedures, and continuity documentation.
  • Lead and drive scalable security design reviews for existing and new features and services.
  • Define and maintain secure and private-by-design development patterns, and architectural and operational best practices.
  • Lead security architecture reviews, threat modeling sessions, and secure coding workshops.
  • Help scale security knowledge across the organization through training and documentation.
  • Support escalations in customer and prospect security reviews and due diligence
• Secure SDLC & Code Review and Testing
  • Mature and integrate scalable security into the SDLC.
  • Provide deep technical reviews for high-risk areas in backend and frontend codebases and services
  • Ensure security testing is properly configured and deployed in code projects and CI/CD pipelines
  • Ensure that testing and review outputs are properly documented, prioritized, and worked through completion
  • Automate fuzzing, SAST/DAST, SBOM generation, and third-party dependency scanning.
  • Facilitate and evolve scalable threat modeling processe