Security & Infrastructure Operations Centre (SIOC) Engineer

At UBDS, we help organisations transform through cloud, cyber security, AI and digital innovation. As our Managed Services capability grows, we're looking for an experienced SIOC Network Engineer to support, maintain and optimise critical customer environments. This is a hands-on technical role within our Security and Infrastructure Operations Centre (SIOC), with a strong focus on networking, connectivity and enterprise infrastructure. You'll work across complex customer environments, troubleshooting network issues, responding to operational incidents and helping ensure services remain secure, resilient and highly available. Location: Manchester (Office-based) Working Pattern: Monday to Friday | Rotating shifts between 08:00–20:00 | On-call rota What You'll Do You'll: Monitor, support and troubleshoot customer network environments. Investigate and resolve network incidents, performance issues and connectivity problems. Configure and support firewalls, routers, switches, VPNs, SD-WAN and associated network services. Provide 2nd line support across enterprise networking, cloud networking and hybrid infrastructure. Troubleshoot LAN, WAN, DNS, DHCP, routing, switching and network security issues. Support firewall rule changes, network access requirements and connectivity requests. Monitor alerts and events across networking, infrastructure and security platforms. Assist with major incidents and work with technical teams to restore services quickly. Support network changes, upgrades and continual service improvement activities. Escalate complex technical issues to senior engineers and technology partners where appropriate. Produce and maintain technical documentation, network diagrams and operational procedures. Work closely with customers, internal teams and technology partners to investigate and resolve technical issues. Contribute to improving monitoring, operational processes and the overall reliability of customer network services. Skills & Experience This is not an exhaustive list of requirements. We're looking for someone with experience in several of these areas and a willingness to learn the rest. If you have a solid networking foundation and are keen to develop your skills, we'd encourage you to apply. Working knowledge of SD-WAN technologies (any vendor). Experience with Arista VeloCloud and/or Aruba EdgeConnect (Silver Peak) is advantageous. Basic understanding of dynamic routing protocols, including OSPF and BGP. Expert-level knowledge is not required. Familiarity with enterprise firewall technologies (any vendor). Experience with Palo Alto Networks and/or Fortinet FortiGate is advantageous. Understanding of enterprise switching concepts, including VLANs, trunking, Spanning Tree Protocol (STP) and basic Layer 3 switching. Experience with any major vendor platform is acceptable. Understanding of enterprise wireless networking and wireless LAN technologies. Exposure to Aruba AOS 8/10, Cisco Meraki or Fortinet…