Lead Network Operations Engineer in London

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. As part of our engineering team, you’ll shape the platforms and tools that drive high‑impact research by designing systems that scale, accelerate discovery and support innovation across the firm. The role is an exciting opportunity to shape and mature operational processes through automation and observability. You will own the reliability, performance, and security of the organisation’s network and security infrastructure across datacentre and office environments.

Key Responsibilities

• Own the day‑to‑day performance, stability, availability, and security of network platforms across datacentre, WAN, and campus environments.
• Lead response to critical incidents, driving rapid diagnosis, containment and long‑term remediation.
• Champion an automation‑first approach, reducing operational toil through tooling, observability and emerging technologies (including agentic AI).
• Develop and refine operational tooling, runbooks and incident response frameworks to ensure consistent, high‑quality service delivery.
• Support an event‑driven network architecture aligned with Infrastructure as Code principles.
• Enhance observability across telemetry, alerting and performance monitoring to enable proactive operations.
• Partner with Network and Security Engineering to ensure new designs meet operational, performance and security standards.
• Drive continuous improvement initiatives focused on efficiency, reliability and scalability.
• Identify systemic issues through incident analysis and implement structural, long‑term fixes.
• Support capacity planning, performance optimisation and operational readiness for changes and upgrades.

Qualifications

• Strong hands‑on experience in networking operations within enterprise or large‑scale environments (datacentre, WAN, campus).
• Proven experience operating network security infrastructure (firewalls, load balancers, proxies, TACACS).
• Solid understanding of switching and routing (Cisco/Arista, L2/L3) and routing protocols (BGP, EVPN‑VXLAN).
• Good knowledge of modern network security principles (zero trust, micro‑segmentation).
• Experience managing physical network circuits and vendor relationships.
• Familiarity with automation and CI/CD tooling (Ansible, Python, Jenkins) and Infrastructure as Code.
• Experience with observability and monitoring tools (Prometheus, Grafana, OpenTelemetry, ELK).
• Strong ability to analyse and troubleshoot distributed systems end‑to‑end.
• Proactive, self‑starting mindset with a strong sense of ownership.
• Comfortable engaging with stakeholders across infrastructure and application teams.

Benefits

• 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.
• Cycle‑to‑work scheme.
• Monthly company events.

G‑Research is committed to cultivating an inclusive work environment that values 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.