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Nik Alleyne

Principal InstructorDirector of Business Development at Sirius Computer Solutions

Specialities

Cyber Defense

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Nik Alleyne

About Nik Alleyne

Every defender has faced that moment when the alerts won’t stop and answers feel out of reach. Nik Alleyne helps them cut through the noise, teaching practitioners how to transform data into understanding and pressure into precision. A SANS Principal Instructor, Nik teaches SANS SEC503: Network Monitoring and Threat Detection In-Depth, SANS SEC504: Hacker Tools, Techniques, Exploits, and Incident Handling, and SANS SEC595: Applied Data Science and AI/Machine Learning for Cyber Security Professionals. He also serves as Head of Managed Security Services at a leading managed security service provider (MSSP), where he leads global teams applying automation and AI to strengthen detection and response. His mission is simple: help defenders see deeper, think smarter, and respond faster.

Over more than two decades, Nik’s career has evolved from systems and network engineering to advanced cyber defense leadership. In his early years, he built and supported large-scale infrastructures; today, he leads managed detection and response programs that safeguard organizations worldwide. In his courses, he demystifies AI and machine learning, showing analysts how to apply these technologies to real-world detection challenges, no data science degree required. His labs mirror the real pressures of security operations, giving students hands-on practice in threat hunting, log analysis, and automated correlation. His students leave class ready to turn theory into action the moment they return to work, equipped with the same playbooks, workflows, and analytical habits used by modern SOC teams.

His expertise is grounded in both real-world experience and academic study. Nik holds a Master of Science in Cyber Security Forensics, a Bachelor of Science in Computer Science, and a Postgraduate Certificate (Hons) in VoIP and Wireless Broadband. He is a Certified Information Systems Security Professional (CISSP) and holds multiple GIAC and Microsoft credentials, including GIAC Certified Intrusion Analyst (GCIA), GIAC Certified Incident Handler (GCIH), GIAC Certified Forensic Analyst (GCFA), and GIAC Penetration Tester (GPEN). Nik 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.

Known for his engaging, hands-on style, Nik believes that great defenders aren’t built through theory, but forged through practice and curiosity. He challenges students to think like adversaries, automate intelligently, and find simplicity in complexity. One student described his course as “a masterclass in turning data into action.” He jokes that his favorite classroom sound isn’t the clicking of keyboards, it’s the “aha!” moment when a student’s detection logic finally works. Beyond teaching, Nik mentors cybersecurity students through local college co-op programs, supports the SANS/Rogers Cyber Secure initiative, and shares insights on his blog, securitynik.com. Whether leading a global SOC or a classroom full of new defenders, Nik’s focus never shifts from building confidence through community and helping students realize that cybersecurity isn’t just a profession, it’s a shared mission to protect what matters most.

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