Enterprise Portfolio Office Manager

Description

As the Enterprise Portfolio Office (EPO) Manager, you will play a pivotal role in shaping, developing, and maturing MAG’s enterprise portfolio capability. Reporting to the EPO Director, you will oversee the day-to-day running of the EPO, ensuring effective governance and supporting critical decision-making forums including the Board and ExCo sub-committees. You will embed consistent enterprise standards, frameworks, and controls that give ExCo and senior leaders a clear line of sight across the Group’s strategic change and BAU priorities. This ensures initiatives are strategically aligned, risks are proactively managed, and business outcomes are delivered with transparency and accountability. Acting as an internal governance expert, you will review and challenge reporting and business cases, coach leaders on the production of high-quality governance artefacts (e.g. forum ToRs, Board/ExCo papers), and help ExCo draw meaningful insight from programme and portfolio reporting. You will also maintain an integrated enterprise view of key change and BAU milestones, enabling proactive management of dependencies, critical paths, and risk exposure. A key part of the role will be driving the adoption of enabling technology solutions — such as a central knowledge hub — to strengthen governance management, improve consistency, and ensure a single version of the truth across the enterprise portfolio. Finally, you will lead the tracking and reporting of agreed KPIs, providing ExCo with timely, accurate insights into governance performance, and identifying opportunities for continuous improvement in effectiveness, efficiency, and value delivery.

Requirements

You will bring extensive experience in enterprise-level governance, portfolio management, or strategic change leadership, ideally gained within complex and regulated environments. You will be confident in engaging, influencing, and building credibility with senior leaders, ExCo, and Board members, and will have an ability to provide enterprise-level insights across both change and BAU portfolios. With strong analytical and problem-solving skills, you will be able to interpret financial, operational, and risk data to generate clear, evidence-based recommendations, and will demonstrate sound commercial acumen to support investment prioritisation and risk-based decision-making. You will be skilled at reviewing and improving governance artefacts such as ExCo and Board papers, Terms of Reference, and portfolio reporting, ensuring high-quality, consistent outputs. We’re looking for someone who is confident in utilising available digital tools to improve efficiency and collaboration, for example use of advanced formulas or pivot tables in Excel or creating team sites in SharePoint. Excellent communication skills will allow you to distil complex information into concise and compelling insights for executive audiences. In addition, you will have experience in embedding enabling technologies—such as portfolio management tools, dashboards, or central knowledge hubs—that strengthen governance and provide a single version of the truth. A degree in business administration, governance, or project/portfolio management (or equivalent professional experience), while professional certifications such as MoP, MSP, PMP, PRINCE2 or PgMP are desirable but not essential where deep equivalent expertise is evident.

Benefits

• Bonus scheme
• 25 days holiday plus bank holidays
• Care Concierge service
• Subsidised public transport
• Free Virtual GP service, available 24 hours a day, 7 days a week
• 10% company contribution pension
• 2 volunteering days per year
• Free parking
• Huge range of company discounts

Training + Development

Interview process

Visa Sponsorship

Security clearance