Network Security Engineer

Arcus Search; Greater London; On-site; GBP 80,000 - 110,000; Full time

Job summary

Arcus Search is seeking a Network Security Engineer for a 6-month contract in London. The role focuses on designing and operating high-performance, resilient enterprise network security infrastructure, with ownership across security design, implementation and initiatives.

You will work with Security Architecture and infrastructure teams to deliver secure, scalable environments, with hands-on experience in Fortinet, Palo Alto, F5, web proxies and traffic inspection, plus knowledge of TCP/IP, DNS,

Qualifications

• Strong experience designing and operating high-performance network security infrastructure.
• Experience with enterprise firewalls (Fortinet, Palo Alto).
• Knowledge of modern security principles and frameworks (NIST/CIS).

Responsibilities

• Design and implement secure, scalable network security environments.
• Collaborate with Security Architecture and infra teams on initiatives.
• Drive security roadmap and architectural initiatives.

Skills

Firewall design

Network security

TCP/IP

Routing & switching

DNS knowledge

Security frameworks

Automation scripting

Privileged Access Management

Tools

Fortinet

Palo Alto

F5

Web proxies

Job description

Network Security Engineer opportunity - 6 month Contract - Quantitative Technology - London

• Looking for an experienced Network Security Engineer with a strong background in designing and operating high-performance, resilient network security infrastructure
• You'll work across a global environment supporting highly technical research and technology operations, with significant ownership across security design, implementation and strategic initiatives
• The focus is on enterprise network security, working closely with Security Architecture and wider infrastructure teams to deliver secure, scalable and reliable environments
• You'll bring strong experience across enterprise firewalls, particularly Fortinet and Palo Alto, alongside web proxies, traffic inspection and F5 technologies
• A deep understanding of packet inspection, TCP/IP, routing, switching, DNS and modern network security principles will be important
• Experience with security frameworks such as NIST or CIS, automation/scripting and Privileged Access Management will be highly relevant

This is a technically demanding Network Security opportunity within a high-performance quantitative environment, with genuine scope to influence security architecture, infrastructure and the wider network security roadmap.