Gijs Hollestelle
Co-Founder at FalconForce
Eindhoven, North Brabant, Netherlands
Summary
👤
Senior🎓
Top SchoolGijs Hollestelle is a security-focused technologist and co-founder with nine years of formal experience and a longer track record in UNIX/Linux system administration and web development. He built research-driven cyber risk solutions at Deloitte—creating the Hackazon cloud-based learning platform—and now leads FalconForce, bringing hands-on expertise in information security, code review, and custom Linux tooling. His career includes impactful low-level contributions such as optimizing yum for Red Hat Linux to dramatically reduce resource usage, reflecting a knack for practical performance improvements. Combining an MSc in Computer Science from TU/e with deep ops-and-security experience, he thrives at the intersection of secure engineering, developer education, and pragmatic systems design.
9 years of coding experience
15 years of employment as a software developer
Master of Science (M.Sc.), Computer Science, Master of Science (M.Sc.), Computer Science at Technische Universiteit Eindhoven
Github Skills (31)
preload10
cybersecurity10
security10
blueteam10
sentinel10
intelligent10
microsoft9
hook9
kubernetes9
analytics9
python9
proxychains9
preloader9
cloud-native9
kql9
Programming languages (6)
Github contributions (5)
FalconForceTeam/KQLAnalyzer
Jul 2023 - Jan 2025
REST server that can analyze Kusto KQL queries against the Sentinel and Microsoft 365 Defender schemas.
Contributions:2 PRs, 2 pushes, 4 comments in 1 year 7 months
gijsh/rhme2_writeups
Mar 2017 - Mar 2017
Contributions:7 commits, 10 pushes, 1 branch in 5 days
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