Roy Kokkelkoren
Chairman - SCIRT (Surfnet Cooperation Incident Response Teams)
Hoofddorp, North Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolRoy Kokkelkoren is an experienced information security specialist and incident response leader with 11 years of practice across government, academia, and private sector engagements. Currently chairing SCIRT at SURF and coordinating Leiden University's Security Operations Centre, he blends operational SOC leadership with hands-on technical skills in pentesting, malware reverse engineering, network analysis, and secure development. A University of Twente computer security master's graduate, he spent seven years advising the Dutch national cybersecurity centre on technical matters affecting government and critical infrastructure. Roy is also an active practitioner of practical tooling and data work — notably contributing a robust parser in the high-profile NCSC-NL/log4shell repository that organized vulnerability data for operational use. Colleagues rely on him for turning complex threat intelligence into actionable processes and for mentoring teams to raise defensive maturity across institutions.
11 years of coding experience
3 years of employment as a software developer
Master’s Degree, Computer Science, Master’s Degree, Computer Science at University of TwenteBachelor’s Degree, Technische Informatica, Bachelor’s Degree, Technische Informatica at Amsterdam University of Applied Sciences
Dutch, English
Github Skills (9)
json10
csv10
beautifulsoup10
python10
onclick9
oneclick9
clickable9
clicking9
vulnerability7
Programming languages (11)
Github contributions (5)
NCSC-NL/log4shell
Dec 2021 - Jan 2022
Operational information regarding the log4shell vulnerabilities in the Log4j logging library.
Role in this project:
Backend Developer
Backend DeveloperContributions:35 commits, 51 PRs, 81 pushes in 1 month
Contributions summary:Roy primarily focused on developing and maintaining a software list parser tool within the `log4shell` repository. Their work involved implementing features for parsing different file formats (CSV and JSON), supporting multiple input files, and calculating column indices. The user refactored the parser and performed code cleanup, adding support for additional status columns and improving the tool's overall functionality. This tool extracts and organizes data related to software vulnerabilities, demonstrating expertise in data parsing and manipulation.
vulnerabilitieslog4jcve-2021-45105logginglogging-library
rkokkelk/nl.xseth.wallbox
Jun 2021 - Nov 2024
Contributions:1 review, 13 PRs, 40 pushes in 3 years 6 months
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