Staff Platform 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!

Staff Platform Security Engineer - Office of the CISO

Position Overview: We’re looking for a Staff Platform Security Engineer to join our team and help drive our product security to the next level and beyond. The ideal candidate for the role will be a highly technical, passionate, team-oriented professional who can evolve our security infrastructure and platform security, embedding secure practices into every layer of our product platform and operations. In this strategic and hands-on role, you will architect, implement, and scale robust security automation, policy enforcement, and threat detection systems across our CI/CD pipelines, data pipelines, and cloud infrastructure and environments. You’ll be instrumental in shaping how security is integrated into software development and operations, driving security visibility, reliability, and trust at global scale.

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 Staff Platform Security Engineer reports to the Chief Information Security Officer and will be responsible for developing, implementing, optimizing, scaling, automating, and operating effective security controls and capabilities within the organization and product suite. The Staff Platform Security Engineer works closely with DevOps and Engineering teams to support the company's security needs, provide support, and facilitate secure technology operations.

Candidates applying for this sensitive and high-impact role should be highly technical team players with software engineering, automation, and application and infrastructure security experience, capable of implementing protection, detection, and 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.

In this role, you will support the company’s overall security mission and help drive alignment, maturity, capacity, and optimization where needed. 

Your Responsibilities Will Include

• Security Architecture and Technical Leadership
• Design and drive a holistic Platform Security strategy aligned with business risk posture and compliance requirements.
• Collaborate with IT, GRC, DevOps, and Engineering teams to build secure and privacy-by-default product hosting platforms.
• Define and implement secure patterns for cloud-native architectures (e.g., containers, serverless, IaC).
• Create automation workflows for security incident detection and response across environments.
• Establish continuous compliance pipelines for standards like SOC 2, ISO 27001, FedRAMP, or HIPAA.
• Lead security architecture reviews, threat modeling sessions, and secure coding workshops.
• Mentor more junior security engineers and influence cross-functional teams through technical thought leadership.

• Ensuring the Obsidian product is built and deployed to a high-security standard
  • Ensure that application code, images, dependencies, and infrastructure are scanned for vulnerabilities and that