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CHECK or CREST Penetration Tester - Leeds

Leeds, West Yorkshire💼 Full-time💰 $40,000–$40,000🗓 2026-06-05 → 2026-07-31

Core

Conducting web application, API, and infrastructure penetration tests, supporting purple team activities, and delivering professional security reports to clients.

Role type

Penetration Tester (Offensive Security)

Builds

Security assessments and remediation guidance for client environments

Domain

Cybersecurity / Offensive Security

Deliverable

production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work

Required skills

Penetration testing, vulnerability assessment, OWASP Top 10 knowledge, exploitation techniques, remediation guidance, technical reporting, client communication

Preferred skills

CREST Registered Tester (CRT) pathway, CTF participation, Hack The Box/TryHackMe experience, purple team activities, phishing simulation, malicious insider assessment

Technologies

API, OWASP, Swift, Web

Responsibilities

Execute end-to-end penetration tests from scoping to report delivery, communicate high-risk vulnerabilities to clients, support junior team members and QA, maintain internal testing infrastructure, contribute to knowledge sharing

Seniority

Mid-level, hands-on IC

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