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About the Role
We are looking for an Offensive Security Manager (Penetration Testing) to establish and grow our offensive security capability. You will lead a team responsible for testing the firm's highest-priority systems, using hands-on offensive techniques to demonstrate whether our security controls can withstand a capable attacker. The team is being established and expanded with a focus on hands-on penetration testing and offensive engineering. AI and automation will play a central role in closing the gaps left by point-in-time testing. This is a build-it, own-it, prove-it role where you will define what a mature offensive security function looks like, setting direction, raising the bar for methodology and evolving the team beyond request-driven testing toward continuous, evidence-based assurance.
Responsibilities
- Leading, developing and growing a team of offensive security engineers and penetration testers
- Owning and delivering the offensive security testing programme across the firm’s highest-priority systems, balancing recurring assessments with testing new and changing services
- Managing testing intake, prioritisation and resourcing, including coordinating external testing partners where required
- Driving offensive testing methodologies, from scope definition through to safe validation of real-world attack paths and control effectiveness
- Establish attack-chain validation and continuous purple teaming with detection and response teams
- Introducing automated assurance capabilities, including breach and attack simulation and adversary emulation tooling
- Overseeing physical and social engineering assessment where appropriate
- Reporting meaningful security metrics to demonstrate control effectiveness and drive continuous improvement
- Building strong working relationships across engineering, risk and incident response teams, communicating findings and influencing decisions through evidence and technical credibility
Requirements
- Strong hands-on experience in offensive security and penetration testing across networks, web and APIs, cloud and infrastructure
- Experience with CI/CD, Kubernetes and identity systems, with exposure to AI or agentic systems
- Experience defining testing scope, rules of engagement and threat-led, attack chain-based assessments
- Familiarity with automation, breach and attack simulation tooling or other approaches to scaling offensive testing
- Experience leading or developing technical teams, including performance management and coaching
- Strong judgement in prioritising work, balancing risk, impact and competing demands
- Experience building teams and evolving ways of working as the function matures
- Strong communication skills, with the ability to explain offensive findings and drive remediation
- Ability to influence technical decisions through credibility, evidence and collaboration
Skills
- Offensive security
- Penetration testing
- Networks
- Web APIs
- Cloud
- Infrastructure
- CI/CD
- Kubernetes
- Identity systems
- AI
- Automation
- Breach and attack simulation
- Adversary emulation
- Physical security assessment
- Social engineering assessment
Location
- London
Work Type
- Full-time
Experience Level
- Manager
Salary/Compensations
- Highly competitive compensation plus annual discretionary bonus
Benefits
- Lunch provided via Just Eat for Business
- Dedicated barista bar
- 35 days’ annual leave
- 9% company pension contributions
- Informal dress code
- Excellent work-life balance
- Comprehensive healthcare
- Life assurance
- Cycle-to-work scheme
- Monthly company events
About the Company
- 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.
Equal Opportunity
- 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