CISO

About Glean:

Glean is the Work AI platform that helps everyone work smarter with AI. What began as the industry’s most advanced enterprise search has evolved into a full-scale Work AI ecosystem, powering intelligent Search, an AI Assistant, and scalable AI agents on one secure, open platform. With over 100 enterprise SaaS connectors, flexible LLM choice, and robust APIs, Glean gives organizations the infrastructure to govern, scale, and customize AI across their entire business - without vendor lock-in or costly implementation cycles.

At its core, Glean is redefining how enterprises find, use, and act on knowledge. Its Enterprise Graph and Personal Knowledge Graph map the relationships between people, content, and activity, delivering deeply personalized, context-aware responses for every employee. This foundation powers Glean’s agentic capabilities - AI agents that automate real work across teams by accessing the industry’s broadest range of data: enterprise and world, structured and unstructured, historical and real-time. The result: measurable business impact through faster onboarding, hours of productivity gained each week, and smarter, safer decisions at every level.

Recognized by Fast Company as one of the World’s Most Innovative Companies (Top 10, 2025), by CNBC’s Disruptor 50, Bloomberg’s AI Startups to Watch (2026), Forbes AI 50, and Gartner’s Tech Innovators in Agentic AI, Glean continues to accelerate its global impact. With customers across 50+ industries and 1,000+ employees in more than 25 countries, we’re helping the world’s largest organizations make every employee AI-fluent, and turning the superintelligent enterprise from concept into reality.

If you’re excited to shape how the world works, you’ll help build systems used daily across Microsoft Teams, Zoom, ServiceNow, Zendesk, GitHub, and many more. You'll be deeply embedded where people get things done. You'll ship agentic capabilities on an open, extensible stack, with the craft and care required for enterprise trust, as we bring Work AI to every employee, in every company.

About the Role

Glean is seeking a Chief Information Security Officer (CISO) to lead security for Glean as a company and for our core product. Reporting to the CTO, you will set the strategy and operating model across product and platform security, corporate security, detection and response, risk, and compliance, turning that strategy into measurable risk reduction.

This is an executive role for a leader who combines technical judgment with strong organizational leadership. You will partner closely with Engineering, Product, Legal, IT, and company leadership to make sound security decisions at the pace of an AI company. You should be able to go deep on architecture and incidents, build a durable program, and communicate clearly about risk and trade-offs.

You will

Set a risk-based security strategy, priorities, policies, metrics, and decision-making mechanisms that scale with Glean’s business. Give executives a clear view of material risks, remediation progress, and decisions that require business ownership, with a clear operating cadence to ensure risks are visible, owned, prioritized, and reduced.

Partner with Engineering and Product to build security into architecture, design, development, release, and operations. Guide security across application and platform layers, identity and authorization, customer-data flows, cloud environments, integrations, and AI-enabled capabilities, including models, agents, and the tools and data they can access.

Lead a measurable vulnerability-management and secure-development program spanning threat modeling, code and dependency risk, software supply-chain security, penetration testing, bug bounty, remediation ownership, and validation. Use automation and AI-assisted analysis thoughtfully to increase coverage and shorten time to fix.

Oversee security for corporate systems, identity, endpoints, SaaS applications, cloud infrastructur