Networks Service Engineer - Contract/Interim

Key Responsibilities

• Operate, maintain, and enhance global LAN/WAN/WLAN services across 20+ countries and 120+ sites, ensuring availability, performance, and resilience.
• Administer and support perimeter and site security devices including Fortinet and Cisco firewalls, and Cisco Meraki MX appliances, in line with agreed standards and governance.
• Manage and support Meraki wireless networks (APs), including configuration templates, RF best practices, firmware strategy, monitoring, and troubleshooting.
• Provide technical ownership for DIA circuits and local ISP connectivity: ordering/ceasing, incident escalation, performance investigation, and proactive resilience improvements.
• Work with ISPs and carriers to validate routing (e.g., BGP where applicable), optimise path selection, and ensure best routing cost and service resilience.
• Participate in incident response and problem management: triage, troubleshooting, root cause analysis, post-incident reviews, and implementation of corrective actions.
• Plan and implement network changes in line with change management processes, including risk assessment, implementation plans, back-out plans, and communications.
• Partner with Security Operations and Cyber Security teams on firewall governance, including rule base management, policy review, access control, logging requirements, and vulnerability remediation.
• Support audits and compliance activities by providing evidence, maintaining accurate documentation, and ensuring controls are implemented and operating effectively.
• Maintain network documentation (diagrams, IP plans, circuit inventory, standards) and contribute to continual service improvement and automation where appropriate.

• Bachelor’s degree in IT, Computer Science, or a related field, or equivalent practical experience.

• 3–7+ years’ experience in network engineering / network operations within a multi-site enterprise environment.
• Hands-on experience with enterprise platforms (Fortinet, Cisco, Juniper or Palo Alto).
• Experience troubleshooting ISP circuit issues and coordinating resolution with carriers/ISPs.
• Working knowledge of ITIL-aligned processes (Incident, Problem, Change) and experience supporting services across multiple time zones.

Skills, Knowledge & Expertise

• Strong understanding of core networking: TCP/IP, VLANs, routing, switching, NAT, VPNs, DNS, DHCP, QoS, and troubleshooting methodologies.
• Hands-on capability with Fortinet and Cisco firewall administration, including policy, objects, NAT, VPN, and logging/monitoring integration.
• Strong experience administering and troubleshooting Cisco Meraki (MX and APs) via Dashboard.
• Understanding of DIA connectivity and carrier services; ability to manage ISP escalations and work to restore service quickly.
• Knowledge of routing and internet path considerations (including BGP basics where applicable) to support resilient, cost-effective routing.
• Working knowledge of security principles: segmentation, least privilege, secure configuration, vulnerability management, and audit/compliance expectations.
• Ability to work effectively with Security Operations and Cyber Security teams to follow governance, produce evidence, and maintain secure firewall operations.
• Strong documentation skills (diagrams, standards, change records) and clear communication with technical and non-technical stakeholders.

• Proven network engineering experience in a multi-site environment, including hands-on troubleshooting and delivery of changes.
• Strong operational knowledge of Cisco Meraki (MX and APs) including configuration, monitoring, and fault isolation.
• Hands-on experience administering enterprise firewalls (Fortinet and/or Cisco), including policy changes performed under governance.
• Experience managing DIA circuits and working with local ISPs/carriers to resolve incidents and improve resilience.
• Good understanding of routing, NAT, VPN technologies, and (where required) BGP fundamentals.
• Ability to work closely with Security Operations / Cyber Security to implement controls, support audits, and maintain secure configurations.
• Strong written and verbal communication skills, with the ability to produce clear documentation and communicate risk/impact during incidents and changes.

• Cisco CCNA (or equivalent routing/switching capability).
• Fortinet NSE 4 / Fortinet FCP (or equivalent hands-on Fortinet firewall administration).

• Cisco CCNP (Enterprise or Security).
• ITIL 4 Foundation.
• Security certification (e.g., Security+), and/or vendor firewall specialisms.