Senior Portfolio Manager

Cornerstone; London; Hybrid; GBP 70,000 - 95,000; Full time

Job summary

A leading company is seeking a Senior Portfolio Manager to oversee the delivery of complex business programmes and projects. You will ensure alignment with corporate objectives and manage risks while providing leadership to project managers. This full-time role offers a competitive salary and is based in London with a hybrid working model.

Benefits

Competitive pension scheme

Enhanced maternity/paternity pay

Life assurance

HolidayPlus

Cycle2work Scheme

Qualifications

• Proven experience leading large-scale business transformation portfolios.
• Strong knowledge of portfolio and programme management methodologies.
• Exceptional stakeholder management skills with executive experience.

Responsibilities

• Lead the planning and delivery of business programmes aligned to priorities.
• Manage interdependencies, timelines, and budgets across the portfolio.
• Engage with stakeholders to ensure alignment and resolve escalations.

Skills

Stakeholder management

Commercial acumen

Risk management

Change management

Education

Relevant professional certifications (e.g. MSP, MoP, PMI PgMP, Agile)

Tools

Agile methodologies

PMI methodologies

Job description

Senior Portfolio Manager

(Fixed-Term Contract / Secondment Until May 2028)

London | Competitive Salary

Full-time | Hybrid/Office based with some UK Travel

Competitive pension scheme – Enhanced maternity/paternity pay – Life assurance – HolidayPlus – Cycle2work Scheme & more

REQ4960

We’re at a big turning point at SGN.

The world is changing fast — expectations from customers, communities, regulators and our stakeholders are rising. Technology is moving quicker than ever. We need to catch up and then stay ahead if we want to be the best GDN in the UK. We need to make sure we’re set up for success. We’re already making great progress with a new CEO and Executive Team, a new COO function and we’ve just moved from five to nine regions in our Southern network, creating closer communities for our people. We’ve opened a Business Services Centre, giving everyone easier access to the services they need, and we’ve brought in 550 new vans, with hundreds more on the way.

But this is just the beginning. We’re focusing on three big goals:

• Supporting our frontline first
• Cutting waste, not corners
• Working smarter, together

We’ve already started work on a five-year programme that will help us achieve our goals, and our journey will continue over the next 3-4 years.

We’re now offering fantastic opportunities for colleagues to help us on this exciting journey.

The FSP / BPR Project Support role is responsible for supporting the effective delivery of the Finance Simplification Programme (FSP) and Business Process Review (BPR). Working closely with Programme and Initiative Leads, the role ensures delivery activities are tracked and governed effectively, enabling progress against time, cost, and quality objectives.

We deliver safety, warmth, and comfort to homes and businesses. Every role, whether in the office or on the front line, plays a key part in this mission. Here’s how you will contribute…

Your Role and Impact

As the Senior Portfolio Delivery Manager, you will be responsible for the oversight and delivery of a complex portfolio of business programmes and projects. You will work at the intersection of strategy, governance, and execution—ensuring that transformation initiatives are aligned with corporate objectives, risks are effectively managed, and benefits are realised.

• Lead the strategic planning, coordination, and delivery of a portfolio of programmes aligned to business priorities.
• Manage interdependencies, resource allocation, timelines, and budgets across the portfolio to optimise delivery and value.
• Engage with senior stakeholders and executive sponsors to ensure alignment, resolve escalations, and drive decision-making.
• Own and evolve portfolio governance structures, ensuring effective reporting, risk management, and benefit realisation.
• Provide leadership and coaching to programme and project managers, supporting the development of best practices across delivery teams.
• Monitor performance across the portfolio using key KPIs, providing insights and recommendations for improvement.
• Act as a key partner to Finance, HR, IT, and other functions to ensure cross-functional alignment and integration of change initiatives

What You’ll Bring

• Proven experience leading large-scale business transformation portfolios or complex change programmes in a senior leadership role.
• Strong knowledge of portfolio and programme management methodologies (e.g. MSP, MoP, PMI, Agile-at-scale).
• Exceptional stakeholder management skills with experience working at executive/board level.
• Ability to navigate ambiguity, influence cross-functional teams, and drive clarity in complex environments.
• Strong commercial acumen, with experience managing budgets, forecasting, and business cases.
• Expertise in risk, issue, and dependency management across multiple concurrent programmes.
• Experience in regulated or complex organisational environments (e.g., utilities, financial services, healthcare) is a plus.
• Relevant professional certifications (e.g. MSP, MoP, PMI PgMP, Agile) are desirable

Not sure you meet every requirement?

Research shows some people – particularly women and those from underrepresented backgrounds – may hesitate to apply unless they meet every criteria. At SGN, we value diverse backgrounds, experiences and perspectives.

If this role interests you but you’re not sure you tick every box, we’d still love to hear from you. You might be just who we’re looking for – now or in the future.

Why SGN?

SGN is a leader in pioneering research and development toward a net-zero energy system. Our cutting-edge technologies and innovative thinking are driving change in the gas industry, all while keeping people safe and warm.

About us | Benefits |Diversity and inclusion

If you require any accommodations or support during the application process, reach out to us. We're here to help ensure an inclusive and accessible experience for everyone.

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