Network Security Engineer (Contract)

G-Research; City of Westminster; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Lunch provided (Just Eat for Business)

Barista bar

Informal dress code

Monthly company events

Job summary

G-Research is seeking an experienced Network Security Engineer to design, implement and maintain scalable security infrastructure at our London HQ. You’ll design security systems, automate controls and partner with Security Architecture to drive roadmaps while supporting global infrastructure.

The role focuses on high-performance networks, deep packet inspection and modern attacker techniques. You’ll collaborate with infrastructure teams to ensure alignment and compliance, delivering secure,

Qualifications

• Familiarity with security frameworks such as NIST and CIS.
• Experience configuring enterprise firewalls (Fortinet, Palo Alto).
• Experience with web proxy technologies and traffic inspection.
• F5 technologies (LTM/ASM/APM) experience beneficial.
• Strong understanding of deep packet inspection and security engineering principles.
• Solid networking knowledge (TCP/IP, routing, switching, DNS).
• Experience with automation and scripting.
• Experience with privileged access management solutions.

Responsibilities

• Design and implement security systems and architectures.
• Deliver high-quality security designs and roll-out strategic initiatives.
• Partner with Security Architecture to drive security roadmaps.
• Collaborate with core infra teams to align infrastructure goals.
• Conduct regular network security audits and ensure internal standards.

Skills

NIST/CIS security frameworks

Fortinet

Palo Alto

Web proxies

F5 LTM/ASM/APM

Deep packet inspection

TCP/IP/DNS

Automation scripting

Privileged access management

Tools

Fortinet

Palo Alto

F5 (LTM/ASM/APM)

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

We’re looking for an experienced Network Security Engineer who’s passionate about building and maintaining high-performance, scalable and resilient network infrastructure.

You’ll be part of a team that designs, automates and supports a global environment, which underpins cutting-edge research and technology operations, and drives the success of G-Research.

Key responsibilities of the role include:

• Designing and implementing security systems
• Delivering high-quality designs and ensuring successful roll-out of strategic initiatives
• Partnering closely with Security Architecture to drive security roadmaps
• Working closely with wider core infrastructure teams to ensure alignment on infrastructure goals and configurations
• Conducting regular network security audits and ensuring compliance with internal standards and best practices
• Being the point of contact for escalations from the operations team
• Implementing change requests

If you’re motivated by solving complex problems, automating at scale and working in a collaborative, high-performance environment, we’d love to hear from you.

Who are we looking for?

You’ll thrive in this role if you bring a mix of deep technical expertise, problem-solving instinct and a passion for modern network security engineering.

We’re looking for someone who can think strategically, automate intelligently and deliver reliably at scale.

The ideal candidate will have the following skills and experience:

• Knowledge of security frameworks such as NIST, CIS or similar
• Experience configuring and operating enterprise firewalls, including Fortinet and Palo Alto
• Experience with Web proxy technologies and traffic inspection
• Familiarity with F5 technologies, including LTM, ASM and APM
• Strong understanding of deep packet inspection, core security engineering principles and modern attacker techniques
• Solid knowledge of networking fundamentals, including TCP/IP, routing, switching and DNS
• Experience with automation and scripting

• Knowledge of privileged access management solutions

Why join us?

• Highly competitive compensation
• Lunch provided (via Just Eat for Business) and dedicated barista bar
• Informal dress code and excellent work/life balance
• Monthly company events