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About the Role

As part of Sky's close-knit Service Reliability team, you will monitor and maintain the health and performance of Sky's 4G EPC and 5G SA Core network elements, ensuring the seamless operation of critical services like VoLTE and VoWiFi. You will act as a key operational contact, triaging faults, coordinating repairs, and managing change activities to uphold network integrity and customer satisfaction.

Responsibilities

• Monitor the health and performance of Sky's 4G EPC and 5G SA Core network elements using CLI and network management tools.
• Monitor VoLTE and VoWiFi service health across the IMS platform, identifying and resolving issues.
• Track mobile data session KPIs and take proactive action on degradations.
• Monitor roaming service performance for inbound and outbound subscribers.
• Act as an operational contact point for MVNO partner issues, triaging faults and coordinating with partner technical teams.
• Perform 'Eyes on glass' monitoring of network monitoring tools across mobile, IP, and fixed voice domains.
• Triage network faults and alerts raised through various monitoring platforms.
• Raise Spark tickets and assign or call out appropriate support teams.
• Execute network repair actions in accordance with established playbooks.
• Monitor change activity and support implementation teams with pre-check and post-check activities.
• Receive inbound calls to the NOC from front-end teams, third parties, suppliers, and partners.
• Manage inbound and outbound access requests.
• Support escalations to the Network Reliability Engineering team for non-BAU faults.
• Provide a 24/7 operational contact point for network issues and incident coordination.
• Coordinate BAU change management activities and implement routine network changes.
• Implement routine network changes in line with operational standards and change control processes.

Requirements

• Possess excellent problem-solving skills and demonstrate a proactive approach to issue resolution.
• Be comfortable monitoring the network, supporting BAU change, and directly resolving incidents using CLI and network management tools.
• Have effective communication skills and the ability to remain calm under pressure.
• Be willing to adapt to evolving technologies and processes within a fast-paced environment.
• Have solid understanding of 4G EPC architecture (MME, SGW, PGW, HSS, PCRF) and ideally 5G SA Core (AMF, SMF, UPF, PCF, UDM).
• Possess working knowledge of VoLTE and VoWiFi call flows, IMS registration, SIP/Diameter signalling, and common failure modes.
• Be familiar with GTP-C and GTP-U protocols and able to interpret signalling logs.
• Understand mobile roaming operations and their impact on data and voice services.
• Have experience working in or supporting an MVNO or thick-MVNO model.
• Possess hands-on experience with CLI-based tools and network management platforms.
• Have a solid understanding of IP networking fundamentals (routing, switching, DNS, DHCP).
• Have experience with telecoms change and incident management processes.
• Be able to interpret information from network monitoring systems and take appropriate action.
• Demonstrate a strong team ethic and the ability to remain focused during high-impact incidents.
• Be capable of articulating technical issues to both technical and non-technical audiences.
• Complete a criminal record check if your application is successful.

Skills

• CLI
• Network Management Tools
• VoLTE
• VoWiFi
• IMS
• GTP-C
• GTP-U
• SIP
• Diameter signalling
• IP Networking
• Routing
• Switching
• DNS
• DHCP
• Change Management
• Incident Management

Location

• London

Work Type

• Hybrid Working

Experience Level

• Not specified

Education Level

• Not specified

Benefits

• Plenty of benefits
• Experiences only found at Sky

About the Company

• Sky is Europe’s biggest entertainment brand, offering top-quality shows, breaking news, innovative tech, and must-have products.
• Careers at Sky mean the freedom and support to make an impact, pushing boundaries, creating solutions, and hitting targets.
• Sky embraces diversity and inclusion, investing in society, fighting racial injustice, and setting ambitious targets for representation.
• Sky's Brick Lane office is in the heart of the East End of London, close to amenities and transport links.
• Sky's Tech, Product and Data teams are inventive and forward-thinking, encouraging exploration and innovation.
• Sky believes in better and supports its employees, community, and a sustainable future for the business and the planet.

Equal Opportunity

• Recognised by The Times and Stonewall for its approach to diversity and inclusion.
• Invests in society, fights racial injustice, and sets ambitious targets for representation.
• Embraces each other’s differences.
• Supports its community and contributes to a sustainable future.