Penetration Tester - CHECK Team Member

Job description

Penetration Tester - CHECK Team Member
Salary: Up to £80,000
Location: UK-wide
Working pattern: Hybrid, predominantly home-based with UK client-site travel when required
Security requirements: Current SC clearance and sole UK nationality
Are you a hands-on Penetration Tester who enjoys finding the weaknesses others miss-and explaining them in a way clients can actually understand?
We're looking for an experienced CHECK Team Member to join a well-established cybersecurity practice delivering technical assurance services to a varied portfolio of clients. You'll test applications, networks and infrastructure, combining manual techniques with industry-standard tools to uncover genuine security risks.
This isn't just about running scans and producing a list of vulnerabilities. You'll investigate findings, demonstrate their real-world impact and provide practical recommendations that help clients strengthen their security.
What you'll be doing
Delivering penetration tests, security assessments and IT Health Checks
Testing web applications, networks and wider IT infrastructure
Using manual and automated techniques to simulate real-world attacks
Producing clear technical reports, executive summaries, scopes and proposals
Explaining findings to both technical and non-technical stakeholders
Providing practical, risk-based remediation advice
Keeping pace with emerging threats, vulnerabilities and testing methodologies
Sharing knowledge and contributing to the development of the wider team
Travelling to client sites across the UK when required
What we're looking for
At least three years' commercial penetration-testing experience
Current CHECK Team Member status
Current SC clearance
Sole UK nationality
Strong hands-on experience with tools such as Burp Suite, Metasploit and Nmap
Good knowledge of Windows and Linux/Unix operating systems
Experience with network devices, firewalls, IDS/IPS and wireless technologies
Understanding of standards and regulations such as ISO 27001, PCI DSS and GDPR
Strong report-writing and client communication skills
A collaborative approach and willingness to share knowledge
Flexibility to travel to UK client locations when needed
Experience testing AI or large language model systems would be useful, but it isn't essential.
If you're looking for varied technical work, interesting client challenges and the opportunity to keep developing alongside an experienced security team, we'd be keen to hear from you.

RSG Plc is acting as an Employment Agency in relation to this vacancy.

Extra information

Status

Open

Education Level

Secondary School

Location

London

Type of Contract

Full-time jobs

Published at

17-09-2026

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English