Penetration Tester

Penetration Tester (CHECK) – UK remote – £50,000 – £90,000 + Benefits + Bonus

Opus has partnered with a rapidly expanding UK cyber security consultancy to recruit experienced CHECK Penetration Testers . This organisation delivers high impact security testing across government, defence, and critical national infrastructure, and is looking to grow their team with professionals who hold active SC clearance and current CHECK status (CTM or CTL) .

Our client offer a variety of role responsibilities, in addition to CHECK Testing, you\’ll be able to work on red team engagements & non-CHECK testing engagements.

Role Responsibilities

• Deliver CHECK‑approved penetration testing across infrastructure, applications, cloud, and bespoke systems.
• Conduct vulnerability assessments, exploitation, and technical security reviews in line with NCSC standards.
• Produce clear, actionable reports and present findings to both technical and non‑technical stakeholders.
• Support scoping and planning of engagements, including complex or multi‑phase assessments.
• Contribute to internal tooling, methodology development, and knowledge sharing.
• Stay current with emerging threats, vulnerabilities, and offensive security techniques.

Mandatory Requirements

• Active SC clearance.
• Active CHECK status: CTM or CTL.
• Strong experience delivering penetration testing across multiple domains.
• Ability to communicate and consult with clients and key stakeholders and a technical and non technical level.

What the Consultancy Offers

• Competitive salary and performance based incentives.
• Clear progression pathways, including training budgets for advanced certifications and CHECK level development.
• Opportunities to influence tooling, methodology, and service offerings as the consultancy scales.
• A culture that values technical excellence, curiosity, and continuous learning.