Franklin Fitch
Senior Penetration Tester
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Join a growing specialist cyber security consultancy with a technically led Offensive Security practice, a varied client base and a strong culture of learning, collaboration and innovation.
About the role
We have an exciting opportunity for an accomplished Senior Penetration Tester to join a high-performing Offensive Security team. You will lead the delivery of complex penetration testing engagements for organisations ranging from innovative technology businesses to large enterprise and public sector clients.
You will identify real-world security risks, deliver rigorous technical assessments and provide clear, commercially relevant advice that helps customers strengthen their security posture.
This position suits someone who enjoys solving challenging technical problems, engaging directly with senior stakeholders and helping to develop other consultants. If colleagues turn to you for technical guidance and you value technical excellence, continuous learning and innovation, this could be an excellent next step.
What you'll be doing
- Lead complex infrastructure, web application, API, cloud and internal penetration testing engagements.
- Conduct advanced security assessments and adversary simulation across complex customer environments.
- Identify, exploit and clearly articulate security weaknesses, attack paths and potential business impact.
- Own engagement planning, technical delivery, customer communication and final reporting.
- Produce high-quality technical reports containing detailed evidence and pragmatic remediation guidance.
- Present findings and recommendations to technical teams, senior leaders and executive stakeholders.
- Provide strategic security advice throughout the engagement lifecycle.
- Mentor less experienced consultants and help raise technical capability across the team.
- Contribute to methodologies, research, tooling and the development of new service offerings.
- Support peer review and quality assurance to maintain consistently high delivery standards.
- Stay current with emerging attack techniques, vulnerabilities and offensive security trends.
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What we're looking for
You will have a strong track record of delivering high-quality penetration testing engagements and be comfortable leading complex assessments with minimal supervision.
You will bring deep technical curiosity, sound judgement and excellent communication skills, enabling you to work confidently with stakeholders ranging from engineers to senior business leaders. You will also enjoy sharing knowledge and supporting the development of others.
Experience and certifications
- CHECK Team Leader (CTL) certification, or the eligibility and experience to operate at an equivalent level.
- CREST Registered Tester (CRT), CCT Infrastructure, CCT Application or an equivalent advanced certification.
- Offensive Security certification such as OSCP, OSWE, OSEP, OSED or OSCE3, or comparable practical expertise.
- Extensive experience delivering and leading penetration testing engagements across multiple technical domains.
- Experience presenting complex findings and risk-based recommendations to technical and executive stakeholders.
- Experience mentoring consultants and contributing to technical quality assurance or peer review.
- Desirable: red team or adversary simulation experience.
- Desirable: cloud security testing experience across Microsoft Azure, AWS or Google Cloud.
- Desirable: scripting or development experience using Python, PowerShell, C# or similar languages.
- Desirable: contributions to security research, tooling development or vulnerability discovery.
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What we offer
- 25 days annual leave, increasing with service up to 30 days, plus additional wellbeing and birthday leave.
- Comprehensive private medical insurance, life assurance and critical illness cover.
- Workplace pension scheme.
- A strong learning and development culture, with support to deepen your technical expertise.
- Company recognition initiatives, team social events and performance incentives.
- The opportunity to work alongside highly skilled offensive security professionals on varied, challenging engagements.
You must have the permanent right to work in the UK. We are unable to provide visa sponsorship for this position.
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