SANS Instructors

European director of advanced assessment at Neuvik, specializing in penetration testing, red teaming, and adversary emulation. Passionate open-source contributor with extensive experience in offensive security technologies.

Terrance Maguire is the chief scientist and managing member of Digital Forensics Academy LLC, conducting digital forensic investigations and providing training to the government and commercial sectors.

Randy Marchany is the Chief Information Security Officer of Virginia Tech, the Director of Virginia Tech's IT Security Laboratory, and a Senior SANS instructor.

David Mashburn has over 20 years of experience in the information technology field. He is currently Chief Information Security Officer at Embry-Riddle Aeronautical University.

SANS Certified Instructor Stephen Mathezer is a cybersecurity expert with over 25 years of cybersecurity experience in both business and industrial environments. He currently teaches ICS410: ICS/SCADA Security Essentials and brings a wealth of hands-on expertise in securing critical infrastructure environments.

Graduate of Purdue University with dual degrees in Computer Science and East Asian studies, Zach is a trailblazing security professional in Japan. Founding a security team and delivering various services from pen-testing to DFIR since 2006, he’s a rare non-Japanese specialist in Japan, leading major corporate security for two decades.

Dave Mayer is a cybersecurity professional with a background in red teaming, threat emulation, and offensive security. As the founder of Neuvik, he has worked extensively on adversary simulations and penetration testing, helping organizations strengthen their security posture against real-world threats.

Shaun McCullough spent 20+ years at the NSA working in cyber operations as a software engineer and technical director of Blue, Red, and Hunt teams. He is currently a staff level Cloud Security Engineer at GitHub.

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.

Douglas McKee, Executive Director of Threat Research at SonicWall, revolutionized cybersecurity by spearheading the detection of over 210,000 novel malware variants and pioneering real-time threat intelligence that accelerates defense responses.

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.

Xavier Mertens is a freelance security consultant based in Belgium.