Penetration Tester

Salary: £40,000 - 80,000 per year

• Conduct security testing on hardware and software to uncover vulnerabilities in complex systems.
• Apply positive and negative testing techniques to stress-test network functions and protocols.
• Script and automate assessments to improve efficiency and repeatability.
• Investigate, analyse, and clearly communicate technical findings and risks.
• Contribute to high quality, actionable technical reports.

• What You’ll Be Doing
• You’ll play a hands-on role in security testing across hardware, software, and telecoms specific technologies.
• Your work will include:
• Conducting security testing on hardware and software to uncover vulnerabilities in complex systems.
• Applying positive and negative testing techniques to stress-test network functions and protocols.
• Scripting and automating assessments to improve efficiency and repeatability. Freeing up your time to do interesting work.
• Investigating, analysing, and clearly communicating technical findings and risks.
• Contributing to high quality, actionable technical reports.

• Hardware
• HTTP
• Network
• Security

Security Testing Specialist – Dive Deep. Think Differently. Build Secure Systems.

Youre someone who cant help but ask Whats really going on under here? Whether its a telecoms protocol, a complex system, or a bespoke piece of hardware, youre driven by curiosity and motivated by making real world technology safer.

Join a collaborative, inclusive team where your ideas matter, your voice is heard, and your work has genuine impact. Youll have the freedom to explore, experiment, and grow, while helping shape the security of next generation networks.

We strive to offer a great work–life balance — if you are looking for full time, part time or flexible options, we will try to make this work where business possible. This will be dependent on the kind of role you do and part of the business you work in.

- Successful applicants must be able to commute to the UKTL offices in Birmingham at least twice a week.

We actively recruit citizens of all backgrounds, but the nature of our work in this specific area means that nationality, residency and security requirements are more tightly defined than others. To work in this role, you will need to hold an SC clearance with no restrictions. You are welcome to apply without already holding SC clearance; however, you will not be able to start in post until the clearance has been successfully granted.

last updated 36 week of 2026