Senior Operations Fibre NOC Engineer

Job Location:

Cardiff

Additional Location Information:

Salary:
Competitive

Contract type:
Permanent

Posting End Date: 01/09/2026

At BUUK Infrastructure, our vision is to be the leading utility partner to accelerate the UK towards net zero for all our customers. Our group of companies has been the major drive for change and innovation over 30 years.

We provide a supportive environment that is committed to enabling our people to be the best - ensuring they feel proud to be themselves and part of BUUK Infrastructure.

We are looking for Senior Operations Fibre NOC Engineer who would like to help us reach our mission to "earn customer loyalty and drive business growth by providing consistently excellent service".

We would also like to hear from applicants that might not necessarily have experience at a Senior level and would be interested in joining as a NOC Engineer with aspirations to progress to a Senior level in the future.

This is a hybrid position, requiring 3 days in our Cardiff office. You will also be required to take part in an out of hours standby rota.

• To support the day-to-day operation of the NOC, incident management processes, continual service improvement initiatives, and the maintenance of network stability and performance.
• To act as a Subject Matter Expert (SME) across the OFNL and Fibre Nest networks, identifying knowledge gaps and developing, documenting, and delivering technical training to ensure a consistent level of expertise across the NOC.
• To provide technical leadership and operational guidance to NOC Engineers, acting as the first point of escalation for complex network faults and service-affecting incidents.
• To lead and deliver operational and network improvement projects, ensuring successful implementation in line with business objectives, timescales, and governance requirements.
• To participate in the out-of-hours escalation rota, providing support to the Network Operations Centre and wider business during service-impacting incidents.

• Manage, operate, maintain, and develop OFNL and Fibre Nest network environments, ensuring secure, resilient, and reliable service delivery.
• Act as a technical escalation point for internal teams, customer service operators, and service providers, delivering excellent customer support.
• Support network availability and performance targets, including maintaining 99.9% service availability.
• Plan, approve, and implement network changes in line with change management processes, minimising risk and customer impact.
• Participate in the on-call rota, supporting major incidents and service outages in accordance with SLAs and incident management procedures.
• Lead complex fault investigations, driving root cause analysis and permanent resolution of recurring issues.
• Maintain operational documentation, network standards, procedures, and knowledge base content.
• Monitor network performance, capacity, and resilience, recommending and implementing service improvements.
• Act as technical lead during major incidents, coordinating internal teams and third-party suppliers.
• Ensure compliance with security, regulatory, business continuity, and TSA requirements where applicable.
• Provide technical input to projects, network designs, infrastructure upgrades, and capacity planning activities.
• Identify and implement automation opportunities to improve operational efficiency and service quality.
• Manage supplier and vendor escalations, service reviews, and technical relationships.
• Produce technical reports, service reviews, and post-incident documentation for stakeholders.
• Provide peer review and technical sign-off for network changes, procedures, and documentation.
• Deputise for the NOC Operations Manager as required.

• Nokia Network Routing Specialist I (NRS I) or Juniper Networks Certified Associate (JNCIA-Junos).
• Equivalent service provider networking certification may be considered.
• ITIL Foundation Certification.

• Incident Management and ITIL principles.
• Nokia Service Router (SR OS) platforms.
• OSPF and BGP routing protocols.
• MPLS technologies including L2
  
  VPN, Epipe, VPLS and L3
  
  VPN services.
• Network fault investigation and…