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Matt Edmondson

Senior InstructorFounder at Argelius Labs

Specialities

Open-Source Intelligence, Cyber Defense, Offensive Operations

Matt Edmondson

About Matt Edmondson

Matt Edmondson is a Senior Instructor and course author at the SANS Institute, where he equips students with the skills to operationalize open-source intelligence (OSINT) against modern threats. He authored and teaches SANS SEC497: Practical Open-Source Intelligence (OSINT) and SANS SEC587: Advanced Open-Source Intelligence Gathering and Analysis, and is also the Founder of Argelius Labs, a boutique cybersecurity firm specializing in OSINT, persistent threat monitoring, and tailored intelligence solutions.

Matt spent two decades conducting investigations and advancing the use of OSINT and digital forensics in support of national security and law enforcement operations. His work included leading complex investigations into cybercrime and dark-web activity. Techniques he pioneered during this time are now embedded into the labs for SEC497 and SEC587, giving students the chance to practice the same methods used in real investigations. This foundation, combined with his consulting work through Argelius Labs, gives students a practical, scalable perspective on operationalizing OSINT.

He holds 12 GIAC certifications spanning forensics, incident response, penetration testing, and OSINT, including the GIAC Certified Forensic Analyst (GCFA), GIAC Open Source Intelligence (GOSI), and GIAC Certified Incident Handler (GCIH), as well as the Offensive Security Certified Professional (OSCP) credential. Matt 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 addition to authoring SEC497 and SEC587, he has spoken at leading conferences including Black Hat, the SANS OSINT Summit (which he chairs), and the SANS AI Summit, while also contributing widely to the community through open-source OSINT tools and resources.

In the classroom, Matt is known for his clarity and ability to make complex topics approachable. His teaching philosophy emphasizes deep technical understanding, enabling him to translate advanced OSINT and forensics concepts into practical, actionable skills. Students consistently praise his ability to connect theory with real-world investigations, and learners leave class empowered to apply what they’ve learned immediately. Outside of work, Matt enjoys classic video games and baseball—he often recalls chasing foul balls as a kid to trade them for snacks at local games. His blend of expertise, curiosity, and approachability makes him not only a respected leader in the OSINT community but also a trusted mentor to the next generation of defenders.

Qualifications Summary

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