Senior Network Engineer

As a Senior Network Engineer, you will lead the design, implementation, and support of enterprise network infrastructure across our UK data center and office environments. This role is focused on data center networking, load balancing, and core network services, ensuring high availability, performance, and security across all platforms.

Are you a seasoned network professional ready to lead the design, implementation, and evolution of enterprise network infrastructure? We are seeking a Senior Network Engineer to drive the planning, deployment, and optimization of our critical IT and security platforms. In this role, you’ll architect solutions, mentor team members, and ensure the seamless delivery of secure, reliable services across the organization.

Join a forward-thinking company committed to pushing the boundaries of technology and driving innovation. Our team is made up of passionate individuals who thrive in a collaborative environment and are dedicated to shaping the future of our industry.

As a Senior Network Engineer
, you will lead the design, implementation, and support of enterprise network infrastructure across our UK data center and office environments. This role is focused on data center networking, load balancing, and core network services, ensuring high availability, performance, and security across all platforms.

• Proactively identify operational risks, performance issues, and security gaps within network and infrastructure environments
• Monitor trends, alerts, and emerging technologies to support continuous improvement of network reliability and security
• Contribute technical input to infrastructure and network strategy under the direction of IT leadership
• Network Design & Implementation
• Design, configure, and support enterprise network infrastructure across UK-based data centers and offices
• Implement and maintain Forti Gate firewalls, including policies, NAT, and high-availability configurations
• Deploy and support FortiADC load balancers, including application delivery, traffic distribution, and high-availability designs
• Configure and manage Dell L2/L3 switching environments, including VLANs, trunking, and inter-VLAN routing
• Design and maintain core routing architecture using protocols such as OSPF
• Provide secure VPN access into the data center for administrative and operational access
• Operations & Troubleshooting
• Provide advanced troubleshooting across routing, switching, firewalls, and load balancing platforms
• Support network monitoring, logging, and alerting to ensure high availability and performance
• Participate in incident response and root cause analysis for network-related outages
• Security & Compliance
• Implement and maintain network security controls aligned with ISO 27001 and Cyber Essentials Plus
• Ensure proper segmentation, VLAN design, and access controls across environments
• Support audit activities through documentation, configurations, and evidence collection
• Change Management & Documentation
• Support network connectivity for co-located UK data center environments
• Manage cross-connects, switching infrastructure, and carrier handoffs
• Ensure resilient and redundant network designs aligned to production requirements
• Fortinet Firewalls (Forti Gate)
• FortiADC (load balancing and application delivery)
• Dell networking (Layer 2 / Layer 3 switching platforms)
• Routing (OSPF)
• VLAN design and network segmentation
• Layer 2 / Layer 3 switching

• Bachelor’s degree in Computer Science, Computer Information Systems, or related field.
• Relevant certifications such as CCNP, CCIE, CISSP, or equivalent are preferred.

• 7+ years of enterprise network engineering experience in data center-centric environments
• Strong hands-on experience with:
• Deep experience with:
• Experience supporting high-availability network architectures
• Experience supporting ISO 27001 and Cyber Essentials Plus compliance environments
• Experience working in 24x7 production environments with on-call responsibilities

• Core Networking
• Advanced TCP/IP networking fundamentals
• Routing, switching, VLANs, and segmentation
• Dell switch configuration and troubleshooting
• FortiADC…