Senior Penetration Tester / Penetration Tester

We're looking for passionate security professionals who love uncovering what's beneath the surface. Whether it's a telecoms protocol or a complex IT system, you're motivated to understand how things work - and how they can be made more secure. You bring a hands-on mindset to testing and analysis, and you're driven by the real-world impact your work can have.

You'll join a collaborative, inclusive team that values expertise, diverse perspectives, and mutual support. We'll give you the freedom to explore, experiment, and grow - while contributing to the development of robust, secure networks that matter.

What You'll Be Doing

For Penetration Tester:

• Testing hardware and software components to uncover vulnerabilities in complex systems.
• Using positive and negative testing techniques (including fuzzing) to push network functions and protocols to their limits.
• Scripting and automating assessments to boost efficiency and repeatability.
• Investigating and communicating findings clearly, showcasing technical risks and their implications.
• Contributing to high-quality technical reports that are thorough, insightful, and actionable.

For Senior Penetration Tester:

• Steering technical assessments of telecoms equipment, identifying vulnerabilities and guiding the direction of testing activities.
• Mentoring and supporting junior team members, fostering their development through hands-on guidance and knowledge sharing.
• Helping to shape the overall test strategy and approach.
• Applying advanced testing techniques and leading scripting/automation efforts.
• Producing high-quality technical reports and influencing security improvements.

We're seeking individuals who:

• Thrive in technical environments and enjoy solving complex problems.
• Bring fresh ideas and collaborate effectively with others.
• Are passionate about security testing and eager to keep learning.
• Have hands-on experience in penetration testing and a solid understanding of exploitation techniques.
• For senior roles, you'll also demonstrate leadership qualities and experience mentoring others.

• Offensive Security Learn Unlimited Subscription (with exam attempts included).
• Hack The Box.
• PentesterLab subscription.
• Plus telecoms-specific online learning resources.

Successful applicants must be able to commute to the UKTL offices in Birmingham at least twice a week. We strive to offer a great work-life balance - full-time, part-time, or flexible options may be possible depending on the role and business needs.

Cyber professionals - your next mission starts here. At UKTL, we protect the UK's critical national infrastructure from cyber threats, keeping people and businesses connected when it matters most. Join us for: Purpose-driven work Cutting-edge research and facilities Collaboration across industry, government, and academia