Senior Transformation Manager

Southern Water; Worthing; Hybrid; GBP 90,000 - 150,000; Full time

Job summary

Southern Water seeks a Senior Manager Transformation Portfolio to lead governance, performance insight and benefits realisation across its transformation portfolio. You will work with senior leaders to support investment decisions, delivery performance and realisation of strategic outcomes.

You will build executive reporting, manage risks, dependencies and opportunities, and lead a small team to drive best practice and continuous improvement in portfolio management.

Qualifications

• Significant experience within Portfolio Management, PMO, Transformation, Business Change or Strategic Planning environments.
• Experience managing complex portfolios comprising multiple programmes, projects and change initiatives.
• Strong understanding of portfolio governance, benefits realisation, investment management and delivery assurance.
• Experience producing executive-level reporting, dashboards and performance insights.
• Strong stakeholder management, influencing and communication skills.
• Experience leading and developing teams within portfolio, programme or transformation functions.

Responsibilities

• Leading portfolio governance, reporting and performance management across transformation initiatives.
• Maintaining the transformation portfolio roadmap and supporting prioritisation and optimisation activities.
• Identifying and managing portfolio-level risks, dependencies and opportunities.
• Delivering high-quality executive reporting, dashboards and portfolio insight.
• Assuring business cases, benefits forecasts and value realisation across the portfolio.
• Building strong relationships with senior stakeholders and acting as a trusted portfolio management advisor.
• Leading and developing a small team while driving portfolio management best practice and continuous improvement.

Skills

Portfolio governance

PMO

Transformation

Business Change

Strategic Planning

Complex portfolios

Executive reporting

Stakeholder management

People leadership

Tools

Enterprise portfolio management systems

Reporting tools

Job description

Closing Date

2026-10-19

Job Title

Senior Manager Transformation Portfolio

Location

Durrington / Hybrid

Contract Type

Permanent

About the role

An exciting opportunity has arisen for a Senior Manager Transformation Portfolio to lead portfolio governance, performance insight, benefits realisation and strategic portfolio planning across Southern Water's transformation portfolio. Working closely with senior leaders across the business, you'll provide oversight, challenge and recommendations to support investment decisions, delivery performance and the successful realisation of transformation outcomes.

What you will be responsible for:

• Leading portfolio governance, reporting and performance management across transformation initiatives.
• Maintaining the transformation portfolio roadmap and supporting prioritisation and optimisation activities.
• Identifying and managing portfolio-level risks, dependencies and opportunities.
• Delivering high-quality executive reporting, dashboards and portfolio insight.
• Assuring business cases, benefits forecasts and value realisation across the portfolio.
• Building strong relationships with senior stakeholders and acting as a trusted portfolio management advisor.
• Leading and developing a small team while driving portfolio management best practice and continuous improvement.

Additional Requirements specific to the role

• Occasional travel to Southern Water sites may be required.
• Hybrid working in line with business requirements.
• Line management responsibility for a small portfolio management team.

What you'll bring to the role

Essential

• Significant experience within Portfolio Management, PMO, Transformation, Business Change or Strategic Planning environments.
• Experience managing complex portfolios comprising multiple programmes, projects and change initiatives.
• Strong understanding of portfolio governance, benefits realisation, investment management and delivery assurance.
• Experience producing executive-level reporting, dashboards and performance insights.
• Strong stakeholder management, influencing and communication skills.
• Experience leading and developing teams within portfolio, programme or transformation functions.

Desirable

• Experience within utilities, infrastructure, engineering or other highly regulated environments.
• MoP, MSP, APM, Agile, PRINCE2 or equivalent professional qualifications.
• Experience supporting strategic investment planning and business case governance.
• Experience using enterprise portfolio management systems and reporting tools.
• Experience driving portfolio digitisation, automation and data-led decision making.