Salary: £50,000 - 90,000 per year Requirements: Extensive experience in a fast-paced, enterprise NOC role (minimum 2nd or 3rd line experience) In-depth support experience of LAN & WAN technologies: R/S: OSPF, BGP, TCP/IP, Layer 2 architectures Exposure to firewalls and load balancing with an understanding of: Security Posture: Firewalling, ACLs, industry best practice, Internet architectures Load Balancing: F5 LB, iRules, persistence, etc. VPN: IPSec and SSL Understanding of Wireless technologies Understanding/experience with ISO and ITIL standards Experience Supporting or Working with Cloud Technologies Enterprise R&S certification (Cisco, Juniper, etc.) - desirable Enterprise Firewall Certification (Palo Alto, Fortinet, etc.) - desirable Enterprise Wireless Certification (Aruba, Meraki, etc.) - desirable Cloud Certification - GCP (Preferable) / AWS / Azure Certification - desirable Toolset Management experience (Solarwinds, or similar) - desirable WCA (Wireshark Certified) - or experience with hardware-based packet capture systems - desirable Multicast: PIM-SM, MSDP, AnyCastRP - desirable Responsibilities: Act as first responders, helping to organize and control incident response Day-to-day monitoring and management of our platforms to ensure that internal SLAs, operational KPIs and quality standards are met Handle complex technical support issues Support network faults to conclusion in a multi-vendor, multi-appliance infrastructure Work closely with other IT teams, vendors, and service providers to resolve incidents and service requests Perform day-to-day Technical Operations activities, including network and firewall troubleshooting, scripting changes, and infrastructure and firmware updates Maintain a positive attitude and a high level of customer service at all times Contribute to the overall development of operational systems and processes Maintain accurate troubleshooting records through industry-standard ticketing systems Write technical SOPs and other documentation Technologies: AWS Aruba Azure Cloud Cisco Firewall Firmware GCP Hardware Support ITIL LAN Load Balancing Network Security TCP/IP VPN More: We are looking for a Network Operations Engineer III for our hybrid role based in Belfast, offering a full-time position from Sunday to Thursday. This role is ideal for an advanced CCNA or CCNP level engineer eager to expand their knowledge of network, security, and cloud technologies. At CME Group, the worlds leading derivatives marketplace, we invest in your success. Our benefits include a bonus programme, equity programme, employee stock purchase plan, private medical and dental coverage, mental health benefits, a group pension plan, and ongoing employee development training. We embrace unique experiences and skills to ensure that everyones perspectives are acknowledged and valued. last updated 13 week of 2026