Defending your Future - Today
We are DEFION - an independent cybersecurity specialist with offices in the Netherlands and Spain, and a team of 90+ security experts helping organizations turn security into a strategic advantage. With our mix of frontline technical security experience and strategic advisory, we make cybersecurity measurable, manageable, and aligned with business growth.
Our Mission
We help organizations stay secure, resilient, and compliant — turning cybersecurity from a technical necessity into a strategic advantage.
Our Vision
A digital world where security drives trust, innovation, and sustainable growth.
Why DEFION?

Active Defense Approach
We connect prevention, detection, and response into one adaptive, research-driven security strategy.

Independent Expertise
We provide objective, vendor-agnostic advice focused solely on our clients’ best interests.

Proven Experience
Our 100+ specialists bring deep technical knowledge and real-world insight from frontline engagements.

Trusted Partnership
We work as an extension of your team, combining technical depth with strategic guidance to strengthen long-term security maturity.

Measurable Impact
We deliver tangible improvements in security posture, compliance, and operational resilience — not just reports.
Our story

2005
Digital expertise companies Incide Digital Data (Spain) and Computest (the Netherlands) are founded. Incide with a primary focus on digital forensics, Computest with a strong focus on code quality, performance and security.
2012
Incide broadens its scope from digital forensics to also include incident response.
2017
Computest acquires pioneering Dutch cyber security company 'Pine Digital Security', founded in 1997.
2022
Incide further broadens their scope from defensive to offensive security.
2023
Computest Security acquires Incide Digital Data, creating a full spectrum independent EU service provider supporting clients in Spain, the Netherlands and beyond.
2025
Building on nearly three decades of hands-on experience in the security field, DEFION Security emerges as a new force in cybersecurity.
DEFION Leadership Team
Our Leadership Team combines deep cybersecurity expertise with business insight. We work side by side with our clients to turn security into a true business accelerator — enabling confident growth and lasting resilience.

Hartger Ruijs
Founder & CEO DEFION Security

Thijs Havenaar
CFO DEFION Security

Dennis de Hoog
CTO DEFION Security

Abraham Pasamar
Founder & CEO DEFION Spain
