Network Security Engineer

Network Security Engineer – Cardiff/ Hybrid – £50,000 plus benefits

Network Security Engineer - Opportunity with a High-growth AI Organisation

An innovative, fast-growing AI company operating in highly regulated industries is looking for an experienced Network Security Engineer to join its Infrastructure team. This is a lead technical position with ownership of network service design and day-to-day security operations.

Location: Cardiff, South Wales (hybrid - 1 day per week on site)

• Lead the design, support, and maintenance of secure network infrastructure
• Act as the SME and escalation point for networking across the organisation
• Ensure network availability, resilience, and compliance with internal standards
• Manage firewall technologies, switching, HA setups, and secure connectivity
• Plan and deliver upgrades, changes, and improvements with strong change control
• Support incident resolution within agreed SLAs
• Work closely with the wider business to ensure stable, secure operations

• Cisco ASA, Cisco Nexus/IOS
• Fortigate
• pf Sense
• High Availability (HA)
• VMware networking
• Secure wireless
• PKI, iSCSI
• VPN, VLAN, RADIUS, DHCP, DNS, NAT

Desirable: Azure/AWS networking, HP Blade, Vyatta, Nutanix, SASE, HAProxy, Linux, PRTG, Unifi, 802.1x

• Proactive, solutions-focused problem solver
• Comfortable taking ownership and driving technical decisions
• Adaptable and able to thrive in a fast-moving environment

You'll play a pivotal role in securing and shaping the network foundations behind mission-critical AI solutions trusted by major enterprises and organisations.

Network Security Engineer – Cardiff/ Hybrid – £50,000 plus benefits