Portfolio Manager

The Adecco Group; Windsor; Hybrid; GBP 70,000 - 100,000; Full time

Job summary

The Adecco Group is seeking a Senior Portfolio Delivery Manager to oversee and manage a critical portfolio for a major UK energy provider. This strategic role involves leading planning and execution across multiple workstreams while ensuring alignment with business and digital strategies, ultimately impacting millions of customers. The position offers the flexibility of hybrid work arrangements with just one day per week in Windsor.

Qualifications

• Extensive experience leading portfolios or large-scale programmes across business and IT.
• Proven ability to manage complex budgets and stakeholder landscapes.
• Strong understanding of change delivery methodologies (agile, waterfall, hybrid).

Responsibilities

• Manage delivery of the portfolio and associated projects.
• Lead stakeholder engagement and change management activity.
• Establish and run portfolio governance.

Skills

Leadership

Planning

Communication

Stakeholder management

Change delivery methodologies

Job description

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Contract: at 6 months, client would also consider temp to perm

We’re looking for an experienced Senior Portfolio Delivery Manager to lead and manage a critical portfolio of transformation and technology initiatives for a major UK energy provider. This is a strategic role focused on shaping, guiding and delivering programmes that impact millions of customers — all while aligning with wider business and digital strategies.

About the Role

In this role, you will take full ownership of a complex, high-value portfolio — leading planning, governance, and execution across multiple workstreams. You’ll ensure delivery stays on track to scope, time and budget, while safeguarding business outcomes and return on investment.

You will play a key role in shaping change direction, supporting long-term planning cycles, and ensuring delivery is aligned to both digital transformation and business unit strategies. You’ll work closely with senior stakeholders and cross-functional teams across business and technology functions.

Key Responsibilities

• Manage delivery of the portfolio and associated projects, ensuring defined business outcomes and benefits are realised
• Own the overall portfolio plan, budget, scope, and prioritisation — proactively managing interdependencies and risks
• Lead the development of business cases, plans, impact assessments and operating models across wide-ranging change initiatives
• Establish and run portfolio governance, driving decisions and resolving obstacles with clear, accurate reporting
• Support the quarterly, annual, and 3-year strategic planning cycle for change, identifying strategic dependencies
• Ensure alignment of delivery with enterprise digital and business strategies
• Champion benefit realisation and ensure return on investment is optimised throughout the portfolio lifecycle
• Lead stakeholder engagement and change management activity to ensure smooth transition and adoption of change
• Manage relationships with internal delivery teams and third-party suppliers to ensure delivery to quality standards
• Build and lead high-performing, cross-functional teams, motivating and coaching others to deliver successful outcomes
• Conduct structured quality assurance and health check reviews across the portfolio as needed

What We’re Looking For

• Extensive experience leading portfolios or large-scale programmes across business and IT
• Proven ability to manage complex budgets, governance, and stakeholder landscapes
• Strong understanding of change delivery methodologies (agile, waterfall, hybrid)
• Demonstrated experience working in or with regulated, customer-centric industries
• Outstanding leadership, planning, and communication skills
• Ability to lead through complexity and ambiguity, aligning delivery to strategic goals

Why Apply?

This is an opportunity to play a pivotal role in delivering business-critical change for a leading organisation with a national footprint. You'll join a collaborative team with strong executive backing and a clear mandate to transform and innovate.

The role is hybrid with just one day per week in Windsor – giving you flexibility alongside strategic impact.

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone’s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  Information Services and IT Services and IT Consulting

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