Lead Network Operations Engineer

G-Research; Greater London; On-site; GBP 60,000 - 80,000; Full time

Benefits offered by this job

Highly competitive compensation plus annual discretionary bonus

Lunch provided

30 days' annual leave

9% company pension contributions

Comprehensive healthcare and life assurance

Informal dress code

Job summary

G-Research in Greater London is seeking a highly skilled Network Operations Specialist to oversee the performance and security of its network infrastructure. This hands-on role entails responsibility for both datacentre and office environments, focusing on operational excellence, automation, and incident response. Candidates should have robust experience in networking operations and security principles, alongside a proactive approach. G-Research offers excellent benefits, including a competitive salary, comprehensive healthcare, and 30 days of annual leave.

Qualifications

• Strong hands-on experience in networking operations within enterprise or large-scale environments.
• Proven experience operating network security infrastructure.
• Solid understanding of switching and routing, and routing protocols.

Responsibilities

• Own performance, stability, availability, and security of network platforms.
• Lead response to critical incidents and drive rapid diagnosis.
• Champion an automation-first approach to reduce operational toil.

Skills

Networking operations

Network security infrastructure

Switching and routing

Modern network security principles

Automation and CI/CD tooling

Observability and monitoring tools

Tools

Ansible

Python

Jenkins

Prometheus

Grafana

OpenTelemetry

ELK

Job description

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 - designing systems that scale, accelerate discovery and support innovation across the firm.

Take the next step in your career.

The role

This 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.

This is a hands‑on technical leadership role focused on operational excellence, automation, observability, and incident response — ensuring high availability, resilience, and a strong security posture.

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

Who are we looking for?

The ideal candidate will have the following experience:

• 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 (e.g. zero trust, micro‑segmentation)
• Experience managing physical network circuits and vendor relationships
• Familiarity with automation and CI/CD tooling (e.g. Ansible, Python, Jenkins) and Infrastructure as Code
• Experience with observability and monitoring tools (e.g. Prometheus, Grafana, OpenTelemetry, ELK)
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• 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

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