Jeroen Vandeleur is a SANS Certified Instructor and co-author of SEC598: AI and Security Automation for Red, Blue, and Purple Teams, and serves as the Technical Innovation Lead at NVISO. In this role, he works alongside a team of domain experts to drive innovation across professional and managed security services, with a strong focus on operationalizing AI workflows within enterprises and building Agentic AI solutions to deliver enhanced Security Operations. His work centers on bridging strategy and execution, translating emerging AI capabilities into scalable, production-ready solutions for security operations. By designing and evolving managed detection and response (MDR), adversary emulation, and automation-driven services, Jeroen brings a unique, field-tested perspective to both his customers and his students. Every concept he teaches is grounded in real-world deployments, lessons learned, and the practical constraints of enterprise environments.
Jeroen’s career began in infrastructure and network-focused roles, where he developed a strong operational foundation. Over time, he expanded into application security, cloud security, incident response, and security monitoring across diverse enterprise environments. This evolution shaped his belief that security innovation must be both technically sound and operationally scalable, especially when integrating AI into detection, response, and decision-making workflows. Through his work, Jeroen actively explores how AI can enhance—not replace—security operations by enabling structured automation, improving reasoning within defined boundaries, and supporting analysts at scale. This philosophy is deeply embedded in SEC598, where students learn how to build resilient, AI-assisted workflows that align with real enterprise needs rather than experimental or isolated use cases.
Holding a bachelor’s degree in Information Management Systems, Jeroen has built broad expertise across security operations, cloud security, and security architecture. Jeroen Vandeleur is also a faculty member of the SANS Technology Institute, which has been designated an NSA Center of Academic Excellence in Cyber Defense and is a multi-year winner of the National Cyber League competition. Beyond his role in industry and education, Jeroen contributes to the cybersecurity community through public speaking, technical content, and open-source initiatives such as PurpleCrew, an agentic AI framework focused on offensive and defensive security automation. His work consistently reflects a forward-looking vision: security teams that are augmented by AI, driven by automation, and designed for continuous adaptation.
In the classroom, Jeroen is known for his energetic and highly practical teaching style. He focuses on actionable techniques, real-world architectures, and repeatable workflows, enabling students to move beyond theory and immediately apply AI-driven security automation in their own environments. His combination of hands-on experience, strategic insight, and passion for innovation makes his courses both relevant and impactful for modern security practitioners.
