Lesley De Keyser
Information Security Officer
Mechelen, Antwerp, Belgium
Summary
👤
Senior🎓
Top SchoolLesley De Keyser is an Information Security Officer and software engineer with a decade of hands-on experience blending cybersecurity, software development, and automation. Currently driving security initiatives at Rydoo and running freelance work through FOSE, she has led incident management, compliance (DORA, ISO 27001, PCI DSS), and 2LoD controls while also delivering client-facing web platforms. Her background in SOAR engineering at NVISO showcases strong DevSecOps skills—automating SOC workflows with Palo Alto XSOAR, Python, GitHub Actions, Jenkins, Ansible and Docker. An active contributor to the OpenCTI connectors (notably enhancing the MISP connector and STIX2 integrations), she brings practical threat intelligence integration experience to defensive programs. Known for rapid learning and analytical rigor, she pairs forensic training from SANS with applied software architecture to turn complex security requirements into operational controls.
11 years of coding experience
3 years of employment as a software developer
FOR500: Windows Forensics Analysis, FOR500: Windows Forensics Analysis at SANS Technology InstituteBachelorgraad Applied Computer Science, Bachelorgraad Applied Computer Science at Erasmushogeschool BrusselWetenschappen Wiskunde, Wetenschappen Wiskunde at Virgo Sapiens Londerzeel
English, Dutch, French
Github Skills (10)
cybersecurity10
cts10
threat-intelligence10
msp10
python10
json9
rest-api8
api-rest8
restful-api8
api-design8
Programming languages (16)
Github contributions (5)
OpenCTI-Platform/connectors
Mar 2021 - Sep 2021
OpenCTI Connectors
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 7 PRs, 5 comments in 5 months
Contributions summary:Lesley primarily contributed to the development of connectors within the OpenCTI platform, specifically focusing on the MISP connector. Their work involved fixing bugs, enhancing the connector with support for object relationships, reports, and processing notes, and adding sector and country support. They demonstrated a strong understanding of the STIX2 format and the integration of MISP data within the OpenCTI framework.
opencticybersecurityctithreat-intelligencemisp
lesleyxyz/python-homewizard-kitchen
Feb 2023 - Aug 2025
Python PIP Library to interact with HomeWizard Kitchen (only Ketttle implemented)
Contributions:1 PR, 15 pushes, 1 branch in 2 years 6 months
python
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