Ruben Groenewoud
Senior Security Research Engineer at Elastic
Limburg, Netherlands
Summary
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Rockstar🎓
Top SchoolRuben Groenewoud is a Senior Security Research Engineer at Elastic with four years of hands-on experience in Linux behavior analysis, ML-driven detection engineering, malware reverse engineering, and signature development. He brings practical red-team and SOC experience from roles including Reservist Cyber Officer and penetration tester, giving him a pragmatic attack-to-detection perspective. Ruben’s background spans cloud and network engineering through internships and early-career roles, enabling him to connect low-level system behavior with enterprise detection needs. Based in Limburg, Netherlands, he combines a Master’s in Information Management and Business Intelligence with a curiosity for translating research into production-ready detection rules and models. Notably, he advances Linux-focused detection techniques at Elastic while maintaining an active GitHub presence under Aegrah, signaling ongoing experimentation and tooling work beyond his day job.
5 years of coding experience
6 years of employment as a software developer
Master's degree Information Management and Business Intelligence, Master's degree Information Management and Business Intelligence at Maastricht University School of Business and EconomicsBachelor's degree Network Engineering, Bachelor's degree Network Engineering at Zuyd University of Applied Sciences
English, Dutch
Github Skills (24)
threat-hunting10
linux10
bash10
security10
persistence10
elastic10
unix9
integrations9
binaries9
blueteam9
reverse-shell9
bypass9
elasticsearch9
java7
logging7
Programming languages (8)
Github contributions (5)
Aegrah/PANIX
Jul 2024 - Feb 2026
Customizable Linux Persistence Tool for Security Research and Detection Engineering.
Contributions:4 releases, 27 PRs, 51 pushes in 1 year 7 months
linuxsecuritybashpersistencebackdoor
Aegrah/webscraper
Jan 2022 - Jan 2025
Contributions:14 pushes in 3 years
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