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Hey, I'm

Tibo Claesens.

Cybersecurity professional based in Belgium. I do pentesting, security audits and help organisations understand where they're vulnerable — and what to do about it.

Tibo Claesens

About

I started my career as a web application developer at Imengine, where I learned how applications really work — and where they tend to break. From there I moved into cybersecurity at Deloitte as a Senior Cyber Security Professional, working on pentesting, audits and security advice for large organisations in Belgium and beyond. I later founded ZeroBit to bring that same level of advice to smaller organisations that don't have a full security team in-house.

Today I focus on what I enjoy most: pentesting web applications and networks, security research, and writing about what I learn along the way. I love working with SMEs and technical teams that want a concrete answer to where they stand — and what the first, realistic steps are to become more resilient against real threats.

Current projects

What I do

Pentesting

Finding vulnerabilities in web applications, APIs, networks and cloud infrastructure before someone else does. Each engagement comes with a clear report, reproducible findings and concrete remediation steps your team can pick up immediately.

Security advising

Helping teams and leadership understand their risk posture and take practical steps to improve it — from baseline assessments and risk analysis to NIS2, ISO 27001 or customer audit preparation.

Writing

Sharing what I learn through honest, jargon-free articles on this blog: lessons from real engagements, explanations of new vulnerabilities, and practical tips for anyone who wants to make a difference without a dedicated security team.

Latest posts

All posts

Want to talk?

Whether it's a project, a question, or just a chat about security — feel free to reach out.

Get in touch