Overview
G-Research is a leading quantitative research and technology firm, with offices in London and Dallas. We are proud to employ some of the best people in their field and to nurture their talent in a dynamic, flexible and highly stimulating culture where world-beating ideas are cultivated and rewarded. This is a role based in our new Soho Place office – opened in 2023 - in the heart of Central London and home to our Research Lab.
The role
We’re looking for a Senior Penetration Tester to join our growing Cyber Security team, reporting into the Security Assessment Manager.
In this role, you’ll 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.
Responsibilities
* 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
Who are we looking for?
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 is a plus
* 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 such as OSCP (required), CRT or OSEP
* Strong communication and interpersonal skills, with an emphasis on clear and concise written output
Why should you apply?
* Highly competitive compensation plus annual discretionary bonus
* Lunch provided (via Just Eat for Business) and dedicated barista bar
* 30 days’ annual leave
* 9% company pension contributions
* Informal dress code and excellent work/life balance
* Comprehensive healthcare and life assurance
* Monthly company events
Seniority level
* Not Applicable
Employment type
* Full-time
Job function
* Information Technology
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