2 of 2 Contract Penetration Testing Jobs in Sheffield

looking for an experienced Adversarial Tooling Engineer to join a major cybersecurity programme within a large, complex enterprise environment. This is not a traditional penetration testing role. We are looking for a strong software engineer with genuine offensive security experience who can design, build and maintain the internal … accelerate repeatable adversarial activities. Implement appropriate AI guardrails including action allow-lists, human approval gates, environment controls and audit trails. Develop evaluation and regression testing for AI and agentic capabilities. Build tooling capable of operating in constrained environments with intermittent connectivity, limited permissions and challenging operational conditions. Apply secure ...

enabled and agentic tooling where appropriate, with suitable guardrails, approval controls and auditability Improve the quality, reliability and maintainability of the wider toolset through testing, documentation, refactoring and automation Work closely with adversarial engineers, defensive security teams and wider technology functions We're looking for: Strong software engineering experience … building maintainable tools and services Practical offensive security experience across Red Teaming, penetration testing or adversary simulation Strong programming experience across languages such as Python, Go, C#, C++ or TypeScript Experience building operator-facing tooling, automation frameworks, APIs or agent/implant components Strong Linux experience, with ...