Vision: To be the UKs 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.

We're looking for a highly organised and driven Demand Governance & Partner Performance Manager to play a critical role in ensuring governance excellence across our demand management and supplier performance activities. Working across multiple programmes and stakeholders, you'll provide the oversight, structure and accountability needed to keep key initiatives moving forward, ensuring decisions are documented, actions are delivered, and governance processes remain robust and auditable.

This is a fantastic opportunity for someone who thrives in a fast-paced environment and enjoys bringing order, control and continuous improvement to complex operational programmes.

Why This Role Matters

Strong governance is at the heart of successful delivery. This role ensures that key business decisions are transparent, traceable, and effectively executed across both internal teams and external partners.

You'll help drive accountability across programmes, maintain governance standards, challenge underperformance, and ensure that stakeholders across Delivery, Commercial, Procurement, Legal and Operations remain aligned. By identifying risks early, managing governance forums, and driving action ownership, you'll play a vital role in supporting successful delivery outcomes across Cornerstone's strategic programmes, particularly within the VMo2 portfolio.

What You'll Do

📋 Demand Governance & Delivery

• Manage and coordinate Demand & Governance Boards, ensuring decisions, actions and outputs are accurately recorded and tracked.
• Maintain governance documentation including action logs, decision registers, trackers and audit records.
• Oversee programme governance activities including prioritisation, approvals and programme lifecycle controls.
• Identify governance risks, process gaps and missed deadlines, escalating issues where appropriate.
• Coordinate inputs from Delivery, Commercial, Procurement, Legal and other business functions to ensure governance compliance.
• Support supplier allocation processes, including change controls and governance approvals.

🤝 Partner Performance Management

• Support Partner Performance reviews and governance meetings through preparation of reports, actions and governance outputs.
• Track actions and commitments arising from supplier performance reviews, ensuring delivery against agreed timescales.
• Analyse supplier performance data to identify trends, recurring issues and delivery risks.
• Escalate concerns through appropriate governance channels and support performance improvement initiatives.

📈 Demand Management & Coordination

• Manage demand trackers, milestone reporting, customer communications and delivery updates.
• Lead the administration of change control and overtake review processes.
• Coordinate and facilitate Demand Forums, ensuring alignment across all customers and stakeholders.
• Challenge inconsistencies in delivery progress, site data and milestone reporting to support effective decision making.

📊 Reporting & Governance Control

• Produce governance packs, executive reports and presentation materials for leadership reviews and stakeholder forums.
• Consolidate information from multiple departments including Delivery, Procurement, New Business, Product and Operations teams.
• Ensure governance frameworks, standards and documentation remain consistent, compliant and fully auditable.
• Promote governance best practice and process discipline across all demand-related workstreams.

What You'll Bring

• Proven experience managing complex processes within a multi-stakeholder, operational or regulated environment.
• Experience working in governance, PMO, delivery assurance, compliance or operational performance roles.
• Strong organisational skills with the ability to prioritise and manage multiple workstreams simultaneously.
• Experience maintaining governance documentation, decision logs, audit trails and reporting packs.
• Confidence engaging with stakeholders at all levels and constructively challenging when required.
• Strong analytical skills with the ability to identify trends, risks and performance concerns from data.
• Excellent written and verbal communication skills.
• Ability to work independently and drive actions through to completion.
• Strong attention to detail and a structured approach to governance and process management.
• Advanced Microsoft Office skills, particularly Excel, PowerPoint and Word.

Why Join Us?
🌟 Competitive salary and bonus opportunity

🏖️ 30 days annual leave

💰 Competitive pension scheme and life insurance

🏠 Hybrid working (3 days per week in Theale)

🏥 Private medical insurance including dental and optical cover

🚲 Cycle to Work scheme

⚡ Electric Car scheme

🛍️ Retail and lifestyle discounts

🤝 Refer-a-friend programme

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 move our organisation forward. We welcome applications from candidates of all backgrounds.

We want to ensure everyone can present their best self throughout the recruitment process, so if you require any adjustments, please let us know.

If this role is of interest and you'd like to find out more, please apply with an up-to-date copy of your CV.