We tackle the most complex problems in quantitative finance, by bringing scientific clarity to financial complexity.
From our London HQ, we unite world-class researchers and engineers in an environment that values deep exploration and methodical execution - because the best ideas take time to evolve. Together we’re building a world-class platform to amplify our teams’ most powerful ideas.
Security is foundational to this mission and must be delivered in a way that supports how our engineering teams build and operate complex systems at scale.
Take the next step in your career.
The roleAs 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.
Key responsibilities of the role include:
- 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
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
- Highly competitive compensation plus annual discretionary bonus
- Lunch provided via Just Eat for Business and dedicated barista bar
- 35 days’ annual leave
- 9% company pension contributions
- Informal dress code and excellent work-life balance
- Comprehensive healthcare and life assurance
- Cycle-to-work scheme
- Monthly company events
G-Research is committed to cultivating and preserving an inclusive work environment. We are an ideas-driven business and we place great value on diversity of experience and opinions.
We want to ensure that applicants receive a recruitment experience that enables them to perform at their best. If you have a disability or special need that requires accommodation please let us know in the relevant section
Skills Required
- Proven expertise across the full penetration testing lifecycle (scoping, execution, reporting, debriefs)
- Deep understanding of vulnerability assessment practices and remediation strategies for infrastructure and applications
- Strong background in technical security roles with familiarity with DevOps/DevSecOps technologies
- Experience validating security controls using manual and automated approaches
- Engineering experience building automation and tooling to streamline security workflows
- Proficiency with development and scripting tools used in DevSecOps, including Python, Jenkins and Ansible
- OSCP security certification
- CRT or OSEP certification
- Strong written and verbal communication and interpersonal skills
What We Do
G-Research is a leading quantitative research and technology firm, with offices in London and Dallas. We hire the brightest minds in the world to tackle some of the biggest questions in finance. We pair this expertise with machine learning, big data, and some of the most advanced technology available to predict movements in financial markets. We take pride in our dynamic, flexible and highly stimulating culture where world-beating ideas are prized and rewarded. We employ some of the best people in their field and are keen to nurture their talent in a supportive working environment.
