Our client, based in Dublin, is seeking an experienced Senior Network Engineer to support and enhance enterprise network infrastructure within a large-scale operational environment. This is a hands-on contract role focused on firewall administration, network security operations, and infrastructure support across on-premise and cloud environments. The successful candidate will play a key role in maintaining secure, resilient, and high-performing network services. Key Responsibilities Administration and support of enterprise firewall platforms including technologies such as Fortinet, Check Point, Palo Alto, or Azure Firewall Management of firewall policies, NAT, VPN connectivity (site-to-site and remote access), and security rulebases Troubleshooting complex network, routing, and connectivity issues across LAN, WAN, and cloud environments Support and maintenance of core network services including switching, routing, DNS, DHCP, and network segmentation Implementation and support of networ...