This role sits within Thames Water’s Commercial function and offers an excellent development opportunity for candidates with strong analytical capability, a solid finance background, and a growing understanding of how commercial operations and supply chains function within a large organisation.

Joining Thames Water means becoming part of a dynamic and evolving industry. The water sector is undergoing its most significant transformation since privatisation, moving towards a more competitive and commercially driven market environment.

Analytical roles within the business are highly valued and recognised as a key talent pipeline, with strong opportunities to progress into wider commercial, operational, and strategic roles across the organisation.

What you’ll be doing as a Commercial Business Analyst

  • Extracting, cleansing, and analysing large, complex datasets to generate actionable insights on historical spend, cost drivers, and operational efficiency opportunities.
  • Supporting forward planning by using data to inform demand forecasting and future commercial decisions.
  • Applying commercial analysis to identify value creation opportunities across the supply chain and broader business operations.
  • Developing and enhancing commercial models, pricing tools, and bid templates using both existing frameworks and newly built solutions.
  • Delivering detailed financial and commercial analysis comparing final costs against budgets, baselines, and sourcing strategies, clearly evidencing business value delivered.
  • Engaging regularly with stakeholders to define analytical scope, gather requirements, and present insights in a clear and impactful way.
  • Supporting internal and supplier-facing discussions by confidently explaining data outputs and commercial implications.
  • Leveraging technical expertise in Power BI to build dashboards, automate reporting, and improve data-driven decision-making.
  • Acting as a champion for analytics tools and systems, supporting the wider business through training and adoption initiatives.

Base location – Hybrid – Clear Water Court, Reading.

36 hours a week.

What you should bring to the role

To succeed in this role, you will bring:

  • A degree in a numerical or analytical discipline such as Finance, Accountancy, Mathematics, Economics, or Business.
  • Proven experience in a similar analytical or commercial role, ideally within a complex organisation or supply chain environment.
  • Strong understanding of how commercial functions operate, including exposure to procurement, sourcing, cost management, and supply chain dynamics.
  • A solid finance background with the ability to interpret financial data and translate it into commercial insight.
  • Advanced technical capability in Power BI for data visualisation and reporting
  • Strong analytical and problem-solving skills, with the ability to work with large datasets and derive meaningful conclusions.
  • Excellent stakeholder engagement and communication skills, with the confidence to present to senior audiences.
  • The ability to manage multiple priorities and deliver high-quality outputs in a fast-paced environment.
  • Advanced Excel skills, including Visual Basic (VBA) and macro development.

What’s in it for you?

  • Salary of up to £50,000 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 company performance measures and targets.
  • Generous Pension Scheme through AON.
  • Access to lots of benefits to help you take care of you and your family’s health and wellbeing, and your finances – from annual health MOTs and access to physiotherapy and counselling, to Cycle to Work schemes, shopping vouchers and life assurance.

Find out more about our benefits and perks (Please note different T&Cs apply if on secondment)

Who are we?

We’re the UK’s largest water and wastewater company, with more than 16 million customers relying on us every day to supply water for their taps and toilets. We want to build a better future for all, helping our customers, communities, people, and the planet to thrive. It’s a big job, and we’ve got a long way to go, so we need help from passionate and skilled people, committed to making a difference and getting us to where we want to be in the years and decades to come.

Learn more about our purpose and values

Working at Thames Water

Thames Water is a unique, rewarding, and diverse place to work, where every day you can make a difference, yet no day is the same. As part of our family, you’ll enjoy meaningful career opportunities, flexible working arrangements and excellent benefits.

If you’re looking for a sustainable and successful career where you can make a daily difference to millions of people’s lives while helping to protect the world of water for future generations, we’ll be here to support you every step of the way. Together, we can build a better future for our customers, our region, and our planet.

Real purpose, real support, real opportunities. Come and join the Thames Water family. Why choose us? Learn more.

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.

When a crisis happens, we all rally around to support our customers. As part of Team Thames, you’ll have the opportunity to sign up to support our customers on the frontline as an ambassador. Full training will be given for what is undoubtedly an incredibly rewarding experience. It’s also a great opportunity to learn more about our business and meet colleagues.

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.