Job Description
Job Title:  Group Commercial Cases Finance Manager
Req ID:  62857
Job Function:  Finance
Posting Start Date:  02/10/2026
Posting End Date:  16/10/2026
Division:  Finance & Business Services
Job Location:  GBR-London-BTHQ One Braham
Advertised Salary:  Competitive + Excellent Benefits

Closing Date: Friday 16th October 2026

About the role

Join one of BT Group's most visible and influential finance teams, working at the heart of strategic decision-making across the business.

As a Group Commercial Cases Finance Manager, you'll play a key role in shaping some of BT's largest investment, commercial, acquisition and transformation decisions. Supporting the Group CEO, Group CFO, BT Investment Board and senior leaders across the organisation, you'll provide insight, challenge and commercial expertise that directly influences the future direction of BT Group.

This is a unique opportunity to gain exposure across all of BT's business units, building a broad understanding of the Group while working on high-profile projects that have a genuine impact on long-term performance and shareholder value. The breadth of experience, stakeholder exposure and strategic perspective gained in this role can open the door to a wide range of future career opportunities across BT.

What you’ll be doing

  • Partnering with senior stakeholders across BT to evaluate strategic investment decisions and provide commercial insight and recommendations.
  • Supporting the BT Investment Board, helping to assess and challenge major investment, customer bid, acquisition and disposal proposals.
  • Managing the planning, governance and administration of BT Investment Board meetings and maintaining associated documentation and processes.
  • Building robust end-to-end financial and commercial analysis to support executive decision-making.
  • Leading pan-BT business cases where investment decisions impact multiple business units.
  • Acting as a trusted adviser to the Group CFO and wider leadership team, responding to strategic and commercial questions as they arise.
  • Providing expert guidance to stakeholders across BT on business case development, investment appraisal methodologies and governance requirements.
  • Driving consistency and continuous improvement in business case standards, templates and investment governance processes.

Essential Skills / Experience

  • Qualified accountant (ACA, ACCA or CIMA).
  • Experience in a commercial finance, business partnering or investment evaluation role.
  • Strong financial modelling and analytical skills, with advanced Excel capability.
  • Ability to distil complex analysis into clear insights, recommendations and senior-level communications.

Desirable Skills / Experience

  • Excellent communication and presentation skills, with the ability to influence senior stakeholders.
  • Experience working with senior finance and non-finance stakeholders.
  • Strong commercial acumen and the ability to assess opportunities from a broader business perspective.
  • Experience operating in a complex, fast-paced and matrixed organisation.
  • Understanding of investment appraisal, business case development and governance processes.
  • Industry experience within a large, complex organisation.

Our Package

Tailored benefits make a real difference. That’s why we offer a comprehensive range to support your growth, wellbeing, and everyday life.

You can design the package to suit you and your lifestyle. Your core benefits include:

  • 10% on target annual bonus
  • Access to an online private GP 24/7 for you and your immediate family
  • Market-leading paid carers leave with up to 2 weeks off
  • Equalized maternity, paternity, and adoption leave – 18 weeks’ full pay and 8 weeks’ half pay
  • Discounted EE and BT products, including mobile and broadband
  • Market leading Pension scheme – 5% from you and 10% from us
  • Holiday purchase scheme

You can select additional benefits, including healthcare, dental, gym memberships and more when you’re ready.

BT Group is the UK’s leading communications group and the holding company behind some of the country’s most recognised brands – including BT, EE, Openreach and Plusnet. Our purpose is as simple as it is ambitious: we connect for good.  Our customers include consumers, small, medium and large businesses, public sector organisations and other communications providers. 

BT Group’s role is about setting direction, unlocking value and creating the conditions for our brands and businesses to thrive.

Having come through the most capital-intensive phase of our fibre investment, our focus now is on what comes next – simplifying how we operate, using technology and AI to work smarter, and organising ourselves to serve customers better and grow sustainably. Group teams shape strategy, policy, brand, capital allocation and transformation, helping the whole organisation perform at its best.

We have a singular culture that unites all our people: we are customer-first challengers, who are committed, clear and connected. These behaviours unite us as one team to deliver for our colleagues, our customers, our stakeholders and the country.   Joining BT Group means working at the heart of a business that matters to the UK, with the opportunity to shape decisions, influence outcomes and help set the future course of one of the country’s most important companies.