About Retest Security
ReTest Security is a Danish-owned IT security testing and analysis company.
On a daily basis, our team of IT security consultants perform many types of IT security testing and advisory services for a wide range of organizations in all industries.
At ReTest, we take pride in delivering independent and technically in-depth security tests and analysis that are easy to work with.
We focus on advising you based on your reality and needs, which can cover everything from minor adjustments to rethinking the design.
Impartial advice with your safety in mind
There is no conflict of interest when it comes to our recommendations. We are not interested in selling hardware and software in the wake of our advice and testing.
Staying impartial is a decision we have made because we are committed to long-term customer relationships – the freedom to point out the best security for your money.
The company is founded by René H. Hansen and Tim B. Andersen, who have both worked with IT security, specifically security testing of corporate applications, websites and infrastructure, for more than a decade. Today, the owners are the two, as well as Christian Nedergaard Christensen and Martin Bech Nielsen.
We strive to build the company in a balance that benefits employees, customers and ReTest when making decisions. It’s not easy, but we are helped along the way by colleagues and customers. Your feedback is crucial.
Our approach to IT security is based on recognized standards such as: OWASP, ISO 27XXX, PTES and NIST.
But communication and accessible recommendations are also central to the value you get from a security advisor. That’s why technical knowledge isn’t the only thing we focus on when hiring and training our people.
Member of the NCC (National Cybersecurity Coordination Center)
ReTest Security is a member of the Danish National Coordination Center for Cybersecurity (NCC), whose purpose is to strengthen the Danish cybersecurity sector, increase the Danish repatriation of cybersecurity funds from the EU and support the development and application of innovative cybersecurity solutions.

Certifications & Trainings
- CRTO – Certified Red Team Operator
- OSEP – Offensive Security Experienced Pentester
- OSCP – Offensive Security Certified Professional
- OSWE – OffSec Web Expert
- eCPPT – eLearnSecurity Certified Penetration Tester
- eWPT – eLearnSecurity Web Penetration Tester
- eWPTX – eLearnSecurity Web Penetration Tester eXtreme
- CEH – Certified Ethical Hacker
- eJPT – eLearnSecurity Junior Penetration Tester
- Master of Science (MSc) in Engineering (Cyber Security)
- Bachelor of Science (BSc) in Engineering (Software)
- AZ-500 – Microsoft Certified Azure Security Engineer Associate
- SC-300 – Microsoft Certified: Identity and Access Administrator Associate
- Microsoft Certified: MCSA – Windows Server 2016
- CAWASP – Certified Azure Web Application Security Professional
- CARTP – Certified Azure Red Team Professional
- CRTP – Certified Red Team Professional
Learn more about the different certifications in the security industry
”With their highly professional approach, they have built trust,
That we don’t have unwanted vulnerabilities.
And those that arise, we get good operational solutions to deal with”
Flemming Bjerring Jensen
IT and Security Manager, Business Denmark
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Contact us
Phone number
+45 77 41 44 14
Address
Hørkær 26
2730 Herlev, Denmark