Penetration Tester

Company: Bonhill Partners
Apply for the Penetration Tester
Location: London
Job Description:

Location: London, Bank: 3-4 days in office.

Details: Initial 6 month contract, with guaranteed conversion to perm within that period.

Initial Contract Rate: TBC

Skills & Experience

  • At least 3 years of hands-on experience within offensive security or red team environments.
  • Proven capability to emulate sophisticated attackers, including establishing footholds, maintaining access and operating covertly within enterprise networks.
  • Strong awareness of real-world adversary behaviour, including insider threats, financially motivated groups and state-backed operations.
  • Comprehensive knowledge of penetration testing methodologies, offensive tooling and attack simulation techniques.
  • Experience translating technical security weaknesses into clear, actionable recommendations for remediation.
  • Strong understanding of advanced threat campaigns, including how attackers plan, execute and adapt their techniques.
  • Good knowledge of modern enterprise technology stacks and how applications, infrastructure and user-facing systems interact.
  • Understanding of defensive security capabilities, including security monitoring, detection engineering and SIEM platforms.
  • Able to investigate technically complex findings, identify key risks and communicate concise conclusions to senior stakeholders.
  • Strong written communication skills, with experience producing technical reports, security assessments and operational documentation.

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Posted: September 22nd, 2026