Numberline Security: Zero Trust Guidance from People Who’ve Done the Work

Numberline Security provides strategic Zero Trust Security education and advisory services, helping organizations make sense of, implement, operationalize, and get maximum security and business value from zero trust. To learn more about our approach, see our Zero Trust Blueprint.

Jason Garbis

FOUNDER & CEO

Jason Garbis is a Zero Trust leader, security advisor, author, and CEO of Numberline Security. He helps organizations move beyond Zero Trust theory and build practical, actionable strategies that reduce risk, improve resilience, and create a clear path to execution.

Jason is co-author of Zero Trust Security: An Enterprise Guide with Jerry Chapman and co-chair of the Cloud Security Alliance Zero Trust Working Group. Known for his hands-on experience and pragmatic approach, he works with security leaders to assess readiness, define priorities, develop Zero Trust blueprints, and operationalize security transformation across complex enterprise environments.

At Numberline Security, Jason focuses on Zero Trust strategy, blueprint and best practices development, security transformation, partner enablement, and enterprise advisory services.

Jerry Chapman

CO-FOUNDER & CTO

Jerry Chapman is a Zero Trust leader, security architect, author, and Chief Technology Officer at Numberline Security. He helps organizations translate Zero Trust strategy into practical, actionable security architecture that can be implemented in real-world enterprise environments.

A security industry veteran, Jerry brings deep expertise across enterprise security, identity, access, infrastructure, and Zero Trust operating models. He is co-author of Zero Trust Security: An Enterprise Guide with Jason Garbis and co-chair of the Zero Trust Working Group at the Cloud Security Alliance.

At Numberline Security, Jerry helps organizations assess readiness, define priorities, develop blueprints, and build realistic paths to Zero Trust execution.

Research and Leadership

Our team literally wrote the book on Zero Trust for the enterprise. Founder Jason Garbis and CTO Jerry Chapman co-authored Zero Trust Security: An Enterprise Guide, a foundational resource for security architects and technical leaders worldwide.

We built on that work with Getting Started with Zero Trust , a practical guide for teams launching their first initiative. It helps leaders define the value of Zero Trust, remove barriers to success, and choose the right starting projects.

Numberline Security continues to advance the field through original research. Our work includes [ZTMM+], an extended version of the CISA Zero Trust Maturity Model.

Insights from the Numberline Security Team

Our team regularly shares practical Zero Trust guidance on the Numberline Security blog. We cover emerging threats, maturity models, implementation lessons, and the latest developments shaping enterprise security. Whether you’re building a strategy or refining an existing program, our insights help you move forward with confidence.