Finance Business Partner

Job title Finance Business Partner  Division Finance & Commercial Location Hybrid - Clearwater Court - RG1 8DB
Contract type Permanent Full/Part-time Full-time Salary Offering up to £70,000 per annum, depending on experience Job grade B Closing date 23/12/2025

At Thames Water, we make a daily difference to the 16 million customers we serve. From supplying 2.6 billion litres of clean water every day to safely managing wastewater, our work underpins the health, wellbeing and prosperity of our communities. As the UK’s largest water company, we’re tackling the challenges of today while building a resilient water future for tomorrow.

We are looking for a Finance Business Partner to join our Finance team and play a pivotal role in supporting the delivery of our capital investment programme.

• Lead financial performance insight for the Capital Programme, providing robust analysis, KPIs and challenge to delivery teams.
• Deliver high-quality financial information, identifying key cost drivers, trends and meaningful insights that support effective decision-making.
• Partner with PMO on monthly reporting and forecasting – interpreting data, challenging assumptions and communicating a clear narrative back to the business.
• Prepare and support additional reporting including commercial settlement outcomes, Integrated Business Plan inputs and quarterly forecasts, including cashflow and risk/opportunity impacts.
• Build strong cross-functional relationships to support continuous improvement and collaborative working across the organisation.
• Enhance performance controls and reporting to drive forecasting accuracy and ensure we “live within our means”, leading monthly review and challenge sessions with Programme Directors.
• Support development of capital investment papers to ensure needs are clearly articulated and governance is satisfied.
• Drive end-to-end process efficiencies and improved financial awareness across the business.
• Support external reporting requirements and assist with accounting issue resolution alongside the management accounting team.
• Validate and report business efficiency initiatives and their expected cashable benefits.
• Respond to ad-hoc analytical requests covering cost visibility, regulatory matters and deep dives into financial performance.

Hybrid - Clearwater Court - RG1 8DB
, with occasional travel to other sites for meetings as required

36 hours, Monday to Friday

• Experience working with planning systems, reporting technology and business intelligence tools.
• Ability to develop insightful data visualisations and working knowledge of SAP, HFM or similar systems.
• Business partnering experience, ideally within project or capital accounting for large or complex projects.
• Confident in challenging and influencing stakeholders while building strong working relationships.
• Excellent financial insight skills, including planning and forecasting.
• Advanced Excel skills; financial modelling or database skills are advantageous.
• Strong organisational and planning skills.
• Exceptional communication skills, both written and verbal.
• Experience in large or complex, matrix organisations.
• Accounting qualification (ACA, CIMA, ACCA or equivalent).

• Competitive salary up to £70,000 per annum, depending on experience
• Annual Leave – 26 days holiday per year increasing to 30 with the length of service (plus bank holidays)
• Performance-related pay plan directly linked to both company and individual performance measures and targets
• Generous Pension Scheme through AON
• Access to a wide range of benefits to support your health, wellbeing and finances, including annual health MOTs, physiotherapy, counselling, Cycle to Work, shopping vouchers and life assurance.

Disclaimer: due to the high volume of applications we receive, we may close the advert earlier than the advertised date, so we encourage you to apply as soon as possible to avoid disappointment.

We’re committed to being a great, diverse, and inclusive place to work. We welcome applications from everyone and want to ensure you feel supported throughout the recruitment process. If you need any adjustments, whether that’s extra time, accessible formats, or anything else just let us know, we’re here to help and support.