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Penetration Tester

ESK Recruitment LTD
Cheltenham
5 days ago
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We’re working with a boutique offensive security consultancy that delivers expert-led, context-aware, and manually executed testing services to clients ranging from start-ups to global enterprises. Moving away from scanners and checklists, they focus on deep-dive, tailored assessments that prioritise quality over quantity.


Their work covers a wide range of technical areas, including web and API testing, mobile apps, internal networks, cloud environments, and red team-style simulations, with web application testing currently making up around 80% of their engagements.


As their first technical hire, they’re looking for a Penetration Tester with strong manual testing skills and a passion for high-quality security work. You’ll be instrumental in shaping delivery standards, tooling, internal processes, and the future technical team as the company scales.


What You’ll Be Doing:

  • Manual testing of web applications and APIs (custom logic flaws, IDOR, authentication issues, etc.)
  • Infrastructure and cloud security reviews across AWS, Azure, and internal/external networks
  • Threat modelling, red team-style assessments, and social engineering for select clients
  • Mobile application testing and internal network assessments (as part of broader project scopes)
  • End-to-end client engagement from scoping and testing through to reporting and debriefing
  • Producing clear, high-signal reports with actionable remediations and relevant risk context


You’ll Help Shape:

  • Testing methodologies and delivery standards
  • Internal tooling, documentation, and operational processes
  • The technical team’s structure and culture as the business grows


What We’re Looking For:

  • 2+ years of experience as a Penetration Tester
  • Strong skills in manual web application testing
  • OSCP or equivalent certifications (e.g. CREST, CRT)
  • Comfortable communicating directly with clients and founders
  • Based in the UK


What’s On Offer:

  • Competitive salary
  • Remote-first working model
  • The opportunity to shape a high-quality, growing consultancy from day one

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National AI Awards 2025

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