Regulatory Financial Modelling Lead

At South West Water we believe that the strongest businesses are built on solid, stable foundations - with a vision and a culture that gives them the freedom to change, improve and innovate. We’re proud to be responsible for providing reliable, efficient and high-quality drinking water and wastewater services for the beautiful South West area. And we have huge ambitions. Not only are we committed to reaching net-zero by 2030, but we’ve also partnered with Wildlife Trusts, National Parks and local partners to help ensure a better future for generations to come. So, if you want to be part of a diverse team where opportunities flow and fresh ideas are welcomed, #JustAddWater. Are you a highly skilled financial modeller with a passion for regulation, analytics and real business impact? Pennon Group is looking for a Regulatory Financial Modelling subject matter expert to lead the development, interpretation and use of our regulatory and econometric financial models. This is a unique opportunity to sit at the heart of our financial decision-making, working with senior leaders—including the Executive team—while shaping how one of the UK's major water groups operates. This is a challenging, diverse role where your expertise will directly influence both our statutory and regulatory reporting, our long-term business planning, and our future strategy. What you’ll be doing

As our Regulatory Financial Modelling Lead, you will:

Build, develop and maintain dual Ofwat financial models (SWB, BRL, SES).

Ensure alignment with PR24 regulatory determinations.

Run stress tests, sensitivities and scenario analysis to guide strategy and investment decisions.

Stay ahead of Ofwat policy developments and wider infrastructure sector trends.

Identify future modelling needs and adapt tools accordingly.

Ensure integrity and consistency across regulatory, shareholder and Treasury valuation models.

Translate complex data into clear, actionable insights for senior leadership.

Produce high-quality reports, commentary, and regulatory submissions.

Work closely with business streams, senior leaders, regulators and auditors.

Draft consultation responses and support business planning and Price Review programmes.

Lead the financial modelling of the company’s five-year business plan.

Support our Price Review work to secure strong, evidence-based outcomes.

What we’re looking for

Qualifications

ACA/ACCA/CIMA (or equivalent).

A postgraduate qualification with strong analytical content or extensive relevant experience.

Proven financial and strategic modelling experience, with models used in practice.

Experience working with large datasets—extracting, cleaning, linking and transforming data.

Ability to present complex analytical findings to non-technical audiences.

Regulatory sector experience and Price Review exposure desirable.

Advanced Excel and MS Power Tools.

Strong analytical capability and strategic thinking.

Understanding of economic regulation and econometrics (Desirable)

Programming skills (R/Python) and statistical software (Stata/SPSS/R) desirable.

High attention to detail and a drive for quality.

Pragmatic, commercially minded problem solver.

Excellent communicator and relationship builder.

Innovative, proactive, and able to plan ahead in a changing environment.

What's in it for you:

We know that the support and commitment of our staff is key to our success so you will receive the opportunity for ongoing development and training for a long-term career with us. We’re one of the largest companies in the South West and are proud to have been awarded Investors in People recognition.

Generous holiday allowance plus bank holidays

A discretionary Bonus

Competitive Contributory Pension

Share-save Scheme

Various health benefits

Wellbeing support programmes

A range of Group Discounts

Cycle to Work Scheme

Financial support services

And plenty more!