Cornerstone
Portfolio Asset Manager
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Vision: To be the UK’s leading digital infrastructure partner, enabling a fully connected future
Mission: Deliver reliable, high quality site access, infrastructure and services that support our customers’ evolving connectivity needs.
About us
For almost two decades, Cornerstone’s infrastructure has quietly supported the UK’s mobile networks. Whilst we continue to strengthen that foundation and extend its reach, we’re in an exciting period of acceleration and product development that will see us enable more connectivity and compute to more communities and industries across the UK.
You’ll be the go-to person for big, complex estate partners—think Network Rail, TfL, utilities, councils and airports building long-term relationships and landing the deals that keep our sites live (and growing).
You’ll negotiate acquisitions and renewals, steer estate management, and be the calm escalation point when commercial or property issues heat up. You’ll also spot new ways to unlock value across portfolios (site-sharing, smart collaborations, better use of real estate) and drive projects from idea to delivery—on time, on budget and to a high standard.
Why This Role Matters
Our network only works if we have the right sites, in the right places, on the right terms and that’s exactly what this role protects and unlocks. You’ll keep critical portfolios secure and service-ready, turning complex property negotiations into continuity for our customers and confidence for our shareholders. Just as importantly, you’ll spot smarter ways to use real estate, improve how we deliver, and help the business grow faster, safer and more efficiently.
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What You’ll Do ✨
- 🤝 Lead senior relationships with portfolio providers; negotiate frameworks and Code agreements.
- 🏗️ Own the end-to-end programme: renewals, acquisitions, upgrades and transactions—protecting tenure and continuity.
- 📈 Drive performance: delivery, governance, forecasting, and Capex/Opex targets—with clear visibility of progress.
- 🧾 Keep the portfolio commercially healthy: P&L focus, value unlocks, and cost control.
- 🚨 Be the main escalation point—solve issues fast and keep stakeholders aligned.
- 🧑 🤝 🧑 Partner closely with Property, Estates, Legal, Finance and Operations to get deals done smoothly.
- 🛠️ Improve how we work: process tweaks, governance upgrades, and supplier performance management.
- 🛡️ Manage risk and compliance (company standards, H&S, environment, BC and info security) to avoid surprises and extra costs.
What You’ll Bring
- Considerable telecoms property functional knowledge gained from working in a mobile network environment
- Experience of telecoms asset management and/or site portfolio management is preferred.
- Extensive experience of delivering material volumes of sites against agreed targets
- Considerable experience of managing 3rd party suppliers
- Considerable experience of working under pressure in a complex & changing environment
- Knowledge of property litigation including an understanding of the Electronic Communications Code and Landlord & Tenant Act legislation in the UK
- Commercially astute
- Excellent interpersonal skills & ability to manage stakeholders of varying levels and across matrix organizations
- Excellent ability to communicate successfully with people at all levels both inside and outside Cornerstone, both verbally and in writing.
- Sound negotiation skills
- Strong planning & organizational ability in delivering business results
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Why Join Us?
- Reward & Recognition: Competitive salary and an excellent bonus structure.
- Time to Recharge: 30 days’ annual leave.
- Long Term Security: Competitive pension scheme and life insurance
- Flexibility: Hybrid working to help you balance work and home life.
- Health & Wellbeing: Private medical insurance including dental and optical cover.
- Lifestyle Perks: Cycle to Work scheme, Electric Car scheme, and retail discounts.
- Community & Growth: A generous refer a friend scheme.
Our commitment to Equity, Diversity, and Inclusion (EDI) is fundamental to our success. We strive to cultivate an inclusive environment where every employee feels valued, respected, and empowered. By embracing unique perspectives and experiences, we drive innovation and drive our organisation forward, therefore, we recognise the importance of welcoming applications from candidates of all backgrounds.
We want to ensure everyone is able to present their best self throughout the recruitment process so if you require any adjustments, please let us know.
If this role is of interest to you and you would like to find out more, please do apply with an up to date version of your CV.
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