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# Penetration Tester

- **Company:** G-Research
- **Location:** London, UK
- **Salary:** £64,348.0
- **Contract:** Permanent contract
- **Skills:** Software System Penetration Testing, Automation of Tests, DevOps, Intrusion Detection and Prevention, Python (Programming Language), Windows Domain, Ansible, Systems Integration, Scripting, Kubernetes, Devsecops, Jenkins, Vulnerability Analysis
- **Published:** October 1, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5904316476

## About the Role

The ideal candidate will have the following skills and experience:

 * Proven expertise across the full penetration testing lifecycle, from scoping and execution to reporting and stakeholder debriefs
 * Deep understanding of vulnerability assessment practices, including effective remediation strategies for both infrastructure and application-level security
 * Strong background in technical security roles across diverse environments; familiarity with DevOps technologies
 * Experience validating the effectiveness of security controls through both manual and automated approaches
 * Engineering experience, particularly in building automation and tooling to streamline team output
 * Proficiency in development and scripting tools commonly used in DevSecOps, including Python, Jenkins and Ansible.
 * Relevant security certifications with OSCP required and CRT or OSEP desirable
 * Strong communication and interpersonal skills, with an emphasis on clear and concise written output

## Description

As a Penetration Tester, you will lead and conduct penetration tests and vulnerability assessments across a wide range of internal systems and security controls. Your work will directly strengthen our overall security posture through continuous testing, actionable insights and collaboration on remediation strategies., * Performing in-depth penetration testing across a variety of technologies, including Kubernetes, Jenkins and Windows Domain Services

 * Delivering practical, impactful remediation advice to Control Owners based on identified vulnerabilities
 * Supporting business and application owners in assessing and improving the effectiveness of their security controls
 * Providing technical consulting and assurance to Risk, Compliance and Detection Engineering teams, including control assessments and configuration reviews
 * Maintaining and enhancing the team's operational tooling, automation and system integrations
 * Mentoring and supporting less experienced team members, fostering knowledge sharing and growth