Geert Hendrickx
Site Reliability Engineer at Telenet
Antwerp Metropolitan Area Belgium
Summary
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Rockstar🎓
Top SchoolGeert Hendrickx is a Site Reliability Engineer with 21 years of experience building and operating large-scale Internet services—specializing in mail, DNS, LDAP, IPv6 and DNSSEC—now focusing on network applications, orchestration and automation at Telenet. A command-line Linux veteran and former PhD researcher in computational arithmetics, he pairs rigorous analytical thinking with practical systems engineering to deliver high-availability, anti-abuse and cryptography-focused solutions. He has deep operational experience across networking and e-mail security and has contributed security fixes and protocol detection improvements to the widely used testssl.sh project. Based in the Antwerp region, he combines decades of hands-on production experience with an early-adopter mindset for emerging network technologies.
20 years of coding experience
17 years of employment as a software developer
Master's Degree, Mathematics, Master's Degree, Mathematics at Universiteit Antwerpen
English, Dutch, French, Russian
Github Skills (20)
ssl10
tls1210
grepl10
it-security10
bash10
regex10
grep10
tls1310
security10
mtls10
openssl10
libtls10
testing9
crypt8
block-cipher8
Programming languages (11)
Github contributions (5)
testssl/testssl.sh
Aug 2020 - Sep 2022
Testing TLS/SSL encryption anywhere on any port
Role in this project:
Security Engineer
Security EngineerContributions:2 reviews, 6 commits, 7 PRs in 2 years 1 month
Contributions summary:Geert primarily focused on improving the security and functionality of the `testssl.sh` script. Their contributions involved fixing potential vulnerabilities and improving the script's accuracy and reliability. This included fixing issues related to escaping characters in grep commands, improving detection of various services and protocols, and correcting SMTP and POP3 detection. The user also addressed warnings generated by more recent versions of grep.
rc4drownopenssltlsanywhere
ghen2/zm-core-utils
Oct 2021 - Nov 2023
zm-core-utils for Zimbra Collaboration Suite, FOSS Edition
Contributions:6 pushes, 7 branches in 2 years 1 month
collaboration-suitecore-utilscollaborationfossutils
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