Penetration Tester

CyberOne Consultant Quote “I am hugely excited about my future and the future of CyberOne. I have enjoyed my time here immensely and have learnt a huge amount in a short space of time, year-for-year I've learnt more here than I have at Microsoft and PwC.” - CyberOne Consultant About CyberOne CyberOne is a pure‑play Microsoft security partner dedicated to helping enterprises realize the full value of the Microsoft Security portfolio—across Defender XDR, Sentinel, Entra, Purview, Intune, Copilot for Security and more. We combine deep technical expertise with outcome‑driven services that accelerate secure cloud adoption, modernise threat protection and simplify compliance. Location Remote Employment Type Full‑time The Role We are seeking an experienced Infrastructure Penetration Tester with a strong focus on Active Directory (AD) security to join our cybersecurity team. The ideal candidate will possess in-depth knowledge of AD environments, demonstrate proficiency in exploiting AD vulnerabilities, and have a proven track record of identifying and mitigating security risks in enterprise infrastructure. Day to day responsibilities Conduct comprehensive penetration tests focusing on enterprise infrastructure, with an emphasis on Active Directory. Perform network and system exploitation to identify potential security risks and vulnerabilities. Identify and exploit vulnerabilities within Active Directory, including misconfigurations, privilege escalation paths, lateral movement, and credential theft. Evaluate AD hardening measures and recommend enhancements to improve security posture. Prepare detailed technical reports outlining attack chains, findings, and remediation strategies. What you bring to the team Proven experience as a Penetration Tester with a focus on infrastructure and Active Directory. Strong understanding of AD architecture, including forests, domains, trust relationships, and GPOs. CREST and Offensive Security certifications (or equivalent) are highly desirable. Excellent problem‑solving skills and the ability to work both independently is critical. Preferred Skills Ability to script in languages such as PowerShell, Python, or Bash for automation and custom exploit development. Experience with other types of penetration testing (e.g. web apps) is a bonus. Role Development CyberOne will support your training needs where possible, allowing you to develop skills and obtain accreditations. Your training and development requirements will be agreed as part of your personal development program. Why Join Us? Work with cutting‑edge Azure technologies and drive cloud transformation projects. Be part of a dynamic team that values innovation, collaboration, and technical excellence . Competitive compensation, career growth opportunities, and access to continuous learning and certifications. Opportunity to work on impactful cloud initiatives across various industries. Elite positioning: Microsoft Security Partner, CREST & NCSC-certified. Access to cutting‑edge MXDR platform & proprietary SecOps tools. No glass ceilings: rapid growth, fast‑track leadership opportunities. Culture‑first: bold values, open feedback, and relentless innovation. What’s In It for You Flexible working hours & remote‑first culture. Birthday off, long‑service awards. Bi‑annual performance awards and team off‑sites. Structured training, technical exposure, and career pathing. Let’s redefine what it means to be secure. Together. #J-18808-Ljbffr