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Senior Penetration Tester

Opus Recruitment Solutions
Liverpool
6 days ago
Applications closed

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Senior Penetration Tester - Assistant Manager

Senior Penetration Tester – UK remote - £60,000 - £80,000


Opus are looking for an experienced Penetration Tester to join our client, a cyber consultancy specialising exclusively in penetration testing and red teaming, delivering high-impact, adversary-simulated engagements for clients ranging from agile tech scale-ups to critical infrastructure providers. As a Senior Penetration Tester, you’ll play a central role in executing and shaping these engagements—across infrastructure, web, cloud, and bespoke environments—while also leading goal-based assessments and full-scale red team operations.


This is a hands-on, client-facing position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team of offensive security specialists.


Key Responsibilities

  • Lead and execute complex penetration tests and adversary simulations
  • Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK
  • Develop custom tooling and exploits where required
  • Create detailed, client-facing technical and executive reports
  • Mentor junior testers and contribute to internal R&D
  • Support scoping, pre-engagement, and post-engagement activities
  • Stay sharp: engage in continuous learning and threat landscape analysis


About You

  • Proven experience inpenetration testing and red teaming(internal, external, app, cloud, etc.)
  • Strong understanding of attacker TTPs and detection evasion
  • Familiarity with frameworks such asOWASP,MITRE ATT&CK, andNIST
  • Experience withC2 frameworks(e.g., Cobalt Strike, PoshC2, Sliver)
  • Certifications such asOSCP, CRTO, OSEP, or CREST CRTpreferred (but not required)
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