Senior IP Capacity Planner

This is a predominantly remote role, with occasional travel required. The team meets in person twice per month in Irlam for collaboration and team sessions. As the UK’s largest independent full fibre network and wholesale platform of choice, we’re busy setting new standards for what digital infrastructure can and should be. Our network is greener, more reliable and designed for the future. The products we run over it lead the way on speed, value and service - helping businesses to innovate, communities to thrive, and people to live more connected digital lives. At CityFibre, you’ll be part of something bigger, helping to build a better-connected Britain, together. Joining us as a Senior IP Capacity Planner, you’ll play a critical role in ensuring the active network never runs out of capacity, covering core, edge, aggregation and access IP domains. Working within the Architecture & Engineering function, you’ll own end-to-end capacity planning, building accurate forecasts and scenario-driven models that enable proactive, strategic decision-making across the network lifecycle. This role goes beyond operational capacity management—you’ll translate demand signals into long-term capacity strategies, investment plans, and delivery priorities, ensuring the network scales efficiently and sustainably. You’ll receive a competitive salary, a performance related bonus, and a range of benefits to support you across your financial, physical and mental wellbeing.

Responsibilities

Owning end-to-end capacity forecasts for active network equipment, including defining thresholds, risks, and augment triggers; Building and maintaining proactive, scenario-based models covering growth, resilience, and failure planning; Translating product growth and demand signals into long-term capacity strategies and budget plans; Generating data-driven augment recommendations and partnering with Engineering and Delivery teams to ensure execution; Using network telemetry, inventory, and performance data to build accurate, governed forecasting models; Incorporating space, power, and peak utilisation metrics into all planning decisions; Leading capacity reviews, influencing senior stakeholders, and ensuring zero capacity-driven incidents

Requirements

Deep hands-on experience in IP capacity planning within a live telecoms environment; Strong track record of owning strategic, end-to-end planning decisions; Comfortable operating at both technical and strategic level, using data, modelling, and scenario planning; Significant experience in IP capacity planning across core, edge, or backbone networks, with ownership of live network decisions; Strong understanding of IP network architecture, including router platforms (e.g. Juniper MX, Nokia SR) and protocols such as MPLS, BGP, OSPF, IS-IS, QoS, and traffic engineering; Proven experience developing and owning long-term forecasting and scenario models to support capacity strategy and investment planning; Strong data and analytical capability, including experience with SQL and Python or R, and exposure to modern data platforms (e.g. Snowflake or similar); Experience working with telemetry, inventory, and performance datasets to build accurate, data-driven capacity plans; Strong stakeholder engagement skills, with the ability to translate complex analysis into clear, actionable insights and influence decision-making

Benefits

Competitive salary; Performance-related bonus; Range of benefits supporting financial, physical and mental wellbeing; Flexible benefits package; Generous annual leave; Extra day off on your birthday; Private medical insurance; Health cash plans; Family-friendly policies; Opportunities to grow your career