Offensive Security Manager

Barlowe LLP; Greater London; On-site; GBP 140,000 - 180,000; Full time

Benefits offered by this job

Competitive compensation

Lunch via Just Eat for Business

35 days annual leave

9% pension contributions

Informal dress code

Healthcare and life assurance

Cycle‑to‑work

Monthly company events

Work‑life balance

Job summary

G-Research is at the forefront of quantitative finance, bringing scientific clarity to complex systems from its London HQ. We unite world‑class researchers and engineers to deliver a world‑class platform, with security foundational to scale.

Lead a growing security team, shape testing strategy and drive continuous improvement across high‑risk systems. You will own offensive testing, define engagement rules, and collaborate with risk and incident response to demonstrate measurable control

Qualifications

• 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.

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 of 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.
• Establishing 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.

Skills

Offensive security

Penetration testing

Networks & APIs

Cloud & infrastructure

CI/CD

Kubernetes

Threat modeling

Team leadership

Communication

Tools

CI/CD tooling

Kubernetes

Identity systems

Automation tooling

Job description

Overview

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.

Key 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 of 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.
• Establishing 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.

Qualifications

• 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.

Benefits

• 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 place great value on diversity of experience and opinions and 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.