Network Engineer, Zscaler

London/Hybrid

circa £100k (flex for the right candidate) + bonus + benefits

We're seeking a highly motivated Network Engineer to join a financial services organisation operating in a secure, high-availability, enterprise environment. This role is ideal for a networking professional with a strong foundation in core infrastructure and hands-on, production experience with Zscaler as a key component of a Zero Trust/SASE strategy.

You'll play a critical role in maintaining and enhancing a modern network architecture that supports a fast-paced, globally distributed business.

Key Responsibilities:

• Support, configure, and maintain enterprise network infrastructure, including Routers, Switches, Firewalls, VPNs, and cloud-based network services
• Administer and support Zscaler as a core security platform, ensuring secure access and alignment with Zero Trust principles
• Monitor network performance and availability; diagnose and resolve issues to ensure optimal uptime
• Assist with the design and implementation of secure, scalable network solutions
• Collaborate with infrastructure, security, and business teams to resolve incidents and support initiatives
• Maintain accurate documentation for network configurations, processes, and incident resolutions
• Participate in an on-call rotation and respond to network incidents as required

Key Requirements:

• Proven experience as a Network Engineer within financial services or a similarly regulated, security-focused environment
• Strong hands-on experience with Zscaler, supporting Zero Trust and SASE architectures
• Solid understanding of networking fundamentals: TCP/IP, subnetting, routing, switching, DNS, DHCP, VLANs, and network security principles
• Experience with Cisco and Meraki technologies, or similar
• Hands-on experience with Palo Alto Firewalls, or similar
• Strong troubleshooting skills with the ability to quickly isolate and resolve network issues
• Familiarity with network monitoring tools and ticketing systems
• Clear written and verbal communication skills, able to explain technical concepts to both technical and non-technical audiences

Why Join

This is an opportunity to work in a high-performance financial services environment where network security, reliability, and modern Zero Trust architecture are mission-critical. You'll have meaningful ownership, exposure to enterprise-scale systems, and the chance to work with leading-edge security technologies.