Join DEFION Security.
Become part of a team of 100+ cybersecurity specialists making a difference every day. Two offices, five disciplines, countless challenges.
View open positionsFour reasons to join us.
Work with top experts
Collaborate with leading specialists on complex projects. From red teamers and forensic investigators to threat hunters and security architects.
Trust, autonomy, and team spirit
Ownership over your work, room to experiment, and a close-knit team that helps each other move forward.
Grow every day
New methodologies, emerging threats, conferences, and certifications. In an expert environment, you learn something new every day.
Work that protects what matters
Every project strengthens real organizations. Your work has direct impact on the digital security of businesses and institutions.
Will you join us?
We are a team of dedicated cybersecurity specialists who take pride in our craft. Our curiosity for new technologies and our drive to understand every detail fuel both our expertise and our energy.
Each day, we help organizations strengthen their IT landscape and elevate their security posture. The digital world is our domain, and we navigate it with confidence and precision.
Excellence is not an ambition here; it is a standard.
Culture @ DEFION Security
At DEFION, we take security and our clients seriously, but not ourselves. We work hard, think deep, and still make plenty of room for humor, curiosity, and the occasional nerdy debate.
We are a team that genuinely enjoys working together. People share ideas freely, help each other grow, and celebrate wins, whether they are major breakthroughs or small moments of progress.
Autonomy is in our DNA: we trust people to do what they are good at and encourage them to explore what they want to master. And while we take our craft seriously, we keep our culture open, friendly, and supportive. A place where you can be yourself, grow, and do work that matters, without losing the fun.
Open positions
Explore our current openings in the Netherlands and Spain. Don't see your role? Send us an open application.
Senior Vulnerability Researcher / Hardware Hacker
Conduct groundbreaking security research on high-impact targets. Compete at Pwn2Own, publish CVEs, present at conferences. You get full freedom to follow your own approach.
Business Developer
Introduce our Active Defense services to new and existing clients. Key account management, hunter mentality, close collaboration with our business units.
Senior Security Specialist
Execute a full spectrum of offensive security assessments. Specialize in the areas that interest you most: cloud, red teaming, consulting, or governance.
Medior SOC Analyst
A sharp eye for threats in our 24/7 MDR operations. Daily work with Microsoft Defender and Sentinel, collaborating with threat hunters and DFIR specialists.
IT Security Internship
Internship for graduating students who want to dive deep into cybersecurity. Your own research project, €500/month compensation, laptop, and free lunch.
Detection Engineer
Design and develop advanced detection rules for SIEM, EDR, and XDR platforms. Transform findings from offensive projects into effective detections. Purple-team mindset required.
SOC Analyst
Monitor and analyze security alerts across EDR/SIEM platforms. Respond to threats, write reports, participate in 24/7 on-call rotation. Work closely with Red and Blue Team.
Don't see your role listed?
We are always looking for talent. Send us an open application and tell us what you can bring to DEFION.
Send an open applicationOur offices
Ready to defend the digital landscape?
Your expertise can make the difference. Apply today and become part of DEFION Security.
Apply now