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Jean-François Maes

Certified InstructorCEO at Offensive Guardian

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Offensive Operations

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Jean-François Maes

About Jean-François Maes

Jean-François Maes is a SANS Certified Instructor and course author, CEO of Offensive Guardian, and founder of Helix Labs, operating at the forefront of offensive security, adversary emulation, and detection engineering. He is the lead author/instructor of SEC565: Red Team Operations and Adversary Emulation and co-author/instructor for SEC699: Advanced Purple Teaming - Adversary Emulation & Detection Engineering, where he equips security professionals with the skills to simulate real-world attackers and strengthen defensive visibility across enterprise environments.

Over the past decade, Jean-François has built a career grounded in hands-on offensive operations, working across penetration testing, red teaming, and purple team engagements. He previously served in roles at NVISO, TrustedSec, and contributed to the Cobalt Strike ecosystem, focusing on adversarial tradecraft and tooling. His experience leading large-scale red team operations directly informs the realism of the course labs.

Jean-François holds the GIAC Information Security Professional (GISP) and has earned recognition in advanced penetration testing competitions. He contributes to the community through tool development and research via Helix Labs. Jean-François Maes 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.

In the classroom, Jean-François is known for his pragmatic, attacker-focused teaching style. Students leave his courses with the ability to emulate threats and improve detection capabilities, he is also known within the student circles as the Instructor with the worst dad jokes you’ll ever hear, which is a reason in itself to sit in in one of his classes. Outside of cybersecurity, Jean likes racing cars, go-karting, going to the gym and networking with other entrepreneurial spirits.

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