Chief Information Security Officer (CISO)

Obsidian Security is the leading SaaS security platform, trusted by global enterprises like Snowflake, T-Mobile, and Algolia. We protect 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.

Founded in 2017 and backed by top investors like Greylock, Obsidian was built to close a critical gap: securing SaaS apps where business happens—Microsoft 365, Salesforce, and hundreds more. The company does this by offering a complete SaaS security platform to reduce risk, detect and respond to threats, and prevent breaches at the source. Obsidian was built by leaders who redefined endpoint and identity security at CrowdStrike, Okta, Cylance, and Carbon Black. Now, they’re transforming how SaaS is secured.

With AI driving rapid SaaS growth and complexity, agentic AI tools gain privileged access to sensitive data through integrations, creating new risks most security tools miss. Obsidian uniquely detects anomalous OAuth token activity and manages integration risks. Major announcements are on the horizon. Recognizing that SaaS security needs to evolve, Obsidian enables growing organizations to start with a lightweight, prevention-focused browser extension and expand coverage over time.

With global momentum, a growing partner ecosystem including SentinelOne, Databricks, and Google Cloud, and a major fundraise ahead, Obsidian is scaling rapidly toward long-term growth and IPO readiness.

The Role

The CISO will own Obsidian's internal security program end-to-end while serving as a visible security leader to our customers, partners, and the broader market. This role reports to the Chief Legal and Trust Officer.

Responsibilities

• Security Strategy & Executive Communication: Design and execute a global security strategy aligned with business growth objectives. Advise the board and executive leadership on critical cyber risk domains with clear, actionable mitigation plans.
• Cyber Risk Management: Own the cyber risk management program, including security risk assessments, third-party vendor reviews, and executive-backed mitigation initiatives targeting measurable risk reduction.
• Security Architecture, Engineering & Operations: Build and lead teams spanning product/application security, infrastructure protection, and security engineering. Oversee threat detection, vulnerability management (with SLA-based performance tracking), and incident response. Establish a guardrail-based controls model for cloud and container workloads.
• Product Security: Embed secure-by-design principles across engineering workflows, integrating security early and consistently throughout the SDLC, including secure coding standards, penetration testing, bug bounty programs, and security requirements for AI/ML components (model integrity, training data protection, prompt injection prevention, output validation).
• AI Security & Governance: Establish enterprise AI governance (acceptable use, data loss prevention for AI inputs, vendor risk assessments for third-party AI services). Build detection and response capabilities for AI-powered attack vectors. Drive adoption of AI and automation across the security function, including AI-assisted threat detection, automated incident response, and intelligent vulnerability prioritization.
• Cross-Functional Partnerships: Partner with Engineering and Product to embed security throughout the development lifecycle, AI/ML feature delivery, and infrastructure architecture decisions. Support Sales and TAM teams by participating in customer security reviews, responding to questionnaires, and enabling the team to speak confidently about Obsidian’s security posture. Collaborate with Marketing to develop security-focused content, support thought leadership positioning and inform messaging around trust and security.
• Customer Trust & External Presence: Serve as the executive-level security contact for prospects and customers during sales cycles, audits, and security reviews. Represent Obsidian in industry forums and public engagements to build market credibility.
• Team Leadership & Budget: Recruit, mentor, and retain a high-performing security organization. Own the security budget with precise, on-target forecasts.
• M&A Due Diligence: Assess the security posture, risk exposure, and integration readiness of prospective acquisition targets.

Qualifications

• 15+ years in information security, with 5+ years in a senior leadership role (CISO, VP/Deputy CISO, Sr. Director of Security, or equivalent).
• Deep experience building and scaling security teams across product security, security architecture, infrastructure protection, and enterprise risk management.
• Strong track record securing cloud-native SaaS environments, including container-based workloads and next-generation security tooling (endpoint protection, CI/CD-integrated code scanning, identity-as-a-service, automated monitoring/remediation).
• Experience developing AI governance frameworks and familiarity with AI/ML attack surfaces (model poisoning, prompt injection, training data extraction, adversarial inputs, ML supply chain risks).
• Experience operating as a customer-facing security executive, including direct participation in sales cycles, regulated entity security reviews, and audits.
• Demonstrated success improving security program maturity using NIST CSF, ISO 27001, or similar frameworks, with measurable results.
• Proven ability to present to boards, advise executive leadership, and communicate security posture to customers in support of revenue goals.
• Effective cross-functional partner with legal, compliance, and IT leadership in a matrixed environment.
• Experience managing siginificant security budgets.
• Master's degree in Information Security, Computer Science, or a related field preferred. Executive leadership education is a plus.

Preferred

• Experience at a cybersecurity vendor, where the CISO role carries both internal and external credibility demands.
• Background in critical infrastructure security (energy, utilities, telecommunications) in addition to SaaS/technology.
• Hands-on experience deploying AI/ML within security operations (SOAR, AI-assisted threat hunting, automated triage) and familiarity with AI security frameworks (OWASP Top 10 for LLMs, NIST AI RMF, MITRE ATLAS).
• Experience securing AI features within a commercial SaaS product, including red-teaming or adversarial testing of AI/ML systems.
• Track record conducting security due diligence for M&A transactions.
• Experience engaging government stakeholders or congressional committees on security matters.