SANS Instructors

Russell is a Principal Consultant and Co-Founder of Cyverity with extensive cybersecurity leadership experience. As former CIO and CISO of the Federal Reserve Bank of Atlanta, he brings real-world expertise to his role as SANS Principal Instructor.

Bryce provides highly specialized ethical hacking and cyber security consulting services to clients around the world and teaches thousands of cyber security professionals how to defend against advanced adversaries.

Timothy Garcia works as an Information Security Engineer for a Fortune 100 financial institution, where he provides security consulting to project teams to ensure security of IT operations and compliance.

Jon Gorenflo has strengthened cybersecurity through leadership in pen testing, incident response, and security engineering. His dedication to mentoring and knowledge-sharing has empowered professionals and enhanced defenses industry-wide.

Ron is a retired US Air Force officer and enlisted person with over 30 years of experience in information technology and information assurance, from software development and system administration to security analysis and security operations.

Jason is a digital forensics, incident response, and cybercrime investigation specialist. He began his career in the early development of the discipline, when he combined his love for computers and technology with his role as a police detective.

Josh leads global MDR at Uptycs, defending major international brands, while also serving as an independent DFIR expert advising legal, government, and commercial clients in Australia.

James Leyte-Vidal, GSE #209, has shaped offensive cybersecurity through decades of frontline innovation, authoring Ethical Password Cracking and leading Fortune 100 InfoSec teams to elevate global cyber defense.

SANS Instructor David Mashburn, CISO at Embry-Riddle and GIAC Security Expert (GSE #157), helps defenders think analytically and turn open-source data into actionable intelligence.

Jeff McJunkin, Rogue Valley InfoSec founder, has led Fortune 100 pen tests and shaped Core NetWars. His key role in SANS Holiday Hack Challenge and hands-on security innovations continue to elevate the industry, advancing defenses worldwide.

Timothy McKenzie redefined offensive security through decades of Red and Purple Team operations, advancing the industry’s threat simulation standards and influencing thousands of cybersecurity professionals with his adversary emulation strategies.

David has been a network engineer, consultant, security designer and architect, author, and technical instructor since the early 1980s and has specialized in IT security and compliance work in the recent years.