Job Description This hybrid role offers a great balance of home and office working. You’ll join your colleagues in your local office at least two days a week. 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 and the Implementation & Planning team, you’ll build accurate forecasts and scenario models to guide timely capacity augments. This role translates demand signals into actionable network plans, budgets and delivery priorities, helping the wider business make informed, forward‑looking decisions. 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. This is some of what you can expect to be doing: Owning end-to-end capacity forecasts for active network equipment with clear thresholds and augment triggers Building and maintaining scenario-based models for growth, failure and resilience planning Translating product growth and build plans into network capacity plans and budget asks Generating capacity augment recommendations and tracking delivery with Engineering and Delivery teams Incorporating space, power and peak usage metrics into all capacity planning decisions Chairing capacity reviews and ensuring zero capacity-driven incidents What you’ll bring to the role You’ll bring deep experience in IP capacity planning within a telecoms environment, alongside strong analytical and modelling capability. You’ll also have: Significant experience in IP capacity planning across core and edge networks Hands-on experience with router architectures and linecards such as Juniper MX or Nokia SR Strong understanding of MPLS, ISIS, BGP, OSPF, QoS and traffic engineering Proficiency in forecasting and time-series modelling, including scenario modelling Strong data and programming skills using SQL and Python or R Excellent communication skills with the ability to work effectively across engineering and planning teams Life at CityFibre Everyone deserves to feel heard, valued and truly included. Working alongside our Employee Communities, we’re committed to creating a workplace where people feel a genuine sense of belonging and pride in what they do. That’s why we’re proud to be a Times Top 50 Employer for Gender Equality, endorsed by WORK180, a Disability Confident Leader, a Care Leaver Friendly Employer, and a signatory of the Armed Forces Covenant Gold Award. We’ll support you to thrive inside and outside of work, with opportunities to grow your career and a flexible benefits package that adapts to your life – including generous annual leave (with an extra day off on your birthday), private medical insurance, health cash plans and family‑friendly policies. Find out more about our culture, communities and benefits on our careers site .