IP Network Designer

The Opportunity

You'll join a highly skilled IP Network Infrastructure Design team within a broader Connectivity Engineering function, responsible for the architecture and design of large-scale, mission-critical networks. These include mobile MPLS core, data centres, internet connectivity, remote access platforms, and enterprise environments. This is a senior-level role acting as an IP Network Design Principal / Technical Design Authority (TDA), contributing to the evolution, performance, and resilience of complex IP networks.

Key Responsibilities

• Maintain network hardware and software in line with vendor support and internal design policies
• Ensure network capacity meets evolving traffic demands and forecasts
• Lead the integration of new services into existing infrastructure
• Produce high-quality design documentation, test plans, and implementation strategies
• Support testing, deployment, and service migration activities
• Monitor network performance against KPIs and develop improvement plans
• Define and evolve network standardisation policies
• Evaluate vendor releases, bug fixes, and security advisories
• Design routing solutions to meet resilience and service targets
• Collaborate with suppliers and attend technical review meetings
• Ensure compliance with architecture, regulatory, data protection, and security requirements
• Conduct peer reviews and support governance of design standards
• Engage with operational teams to ensure smooth transition into live environments
• Provide expert consultancy across network design projects
• Contribute to continuous process improvement initiatives

Essential Skills & Experience

• Cisco certification (CCIE not required)
• Strong experience in IP, MPLS, and BGP design within a service provider environment
• Deep understanding of IP networking protocols and architectures
• Hands-on experience with Cisco (CRS, ASR, 7600) and Juniper (MX, PTX) platforms
• Knowledge of telecommunications transmission systems
• Strong communication skills, with the ability to present complex technical concepts
• Experience with change control processes
• Background in hardware and software testing

Desirable

• Experience within a mobile network operator environment
• Knowledge of RADIUS, QoS, DNS, or session management technologies
• Experience in network build and support
• Juniper certifications (JNCIE, JNCIP, etc.)
• Exposure to TSA implementation or standards
• Flexibility to support occasional out-of-hours changes
• Strong collaboration and technical leadership skills

Additional Information

• No line management responsibility
• Involvement in budget forecasting
• Flexible working environment
• Occasional travel to UK offices (Reading, Leeds) and vendor sites

Compliance & Responsibility

You will play a key role in upholding business principles, ensuring compliance with legal, regulatory, and security standards. This includes safeguarding sensitive information, maintaining accurate systems, and proactively seeking guidance when required.