Business Case Assurance Manager

Atomic Weapons Establishment; Milton Keynes; Hybrid; GBP 43,000 - 53,000; Full time

Benefits offered by this job

9-day fortnight

270 hours annual leave

Market pension scheme (9-13%)

Career development funding

Employee Assistance Programme

Life Assurance (4x salary)

Discounts on everyday spending

Special Leave for volunteering

Job summary

Atomic Weapons Establishment is recruiting for a Business Case Assurance Manager to join the E-PMO function. The role requires expertise in developing robust business cases using the HM Treasury Five Case Model and in maturing the assurance process.

Hybrid working is available, with 2-3 days onsite per week. You will deliver training, develop dashboards and reporting, and collaborate with internal and external stakeholders to ensure efficient decision-making and governance.

Qualifications

• Experience in a project support/PMO or portfolio support environment.
• Strong written and verbal communication with stakeholders.
• Experience writing, reviewing or assuring business cases using structured approaches.
• Business analysis and/or Continuous Improvement experience.
• Ability to identify and implement improved ways of working with a focus on efficiency and quality.

Responsibilities

• Provide guidance to project teams on developing robust business cases using the HM Treasury Five Case Model.
• Develop and improve the business case assurance process and pipeline.
• Deliver training and Learning from Experience activities for colleagues involved in business case production, assurance and governance.
• Develop management information, reporting tools and dashboards to oversee the business case pipeline.
• Build strong relationships with AWE stakeholders and the wider Defence assurance community.

Skills

PMO experience

Stakeholder management

Communication skills

Business case writing

Continuous improvement

Education

Bachelor or equivalent (desirable)

APM Practitioner (beneficial)

Tools

HM Treasury Five Case Model

Job description

Business Case Assurance Manager

Closing date: 25th November 2026

Location: Located between Reading and Basingstoke, with free onsite parking.

Package: Starting from £47,760 (depending on your suitability, qualifications, and level of experience)

Working pattern: AWE operates a 9-day working fortnight.

Let us introduce the role AWE is currently recruiting for a Business Case Assurance Manager to join our E-PMO function.

Key responsibilities

• Providing advice and guidance to project teams on developing robust business cases using the HM Treasury Five Case Model.
• Developing and continuously improving the business case assurance process and pipeline.
• Delivering training and Learning from Experience (LFE) activities for colleagues involved in business case production, assurance and governance.
• Developing management information, reporting tools and dashboards to support effective oversight of the business case pipeline.
• Building strong relationships with AWE stakeholders and the wider Defence assurance and scrutiny community.

Who are we looking for?

We do need you to have the following:

• Experience working in a project support, PMO or portfolio support environment, with the ability to manage your own workload and use your initiative.
• Strong written and verbal communication skills, with the ability to build effective relationships and provide clear advice and guidance to a range of stakeholders.
• Writing, reviewing or assuring business cases and applying structured approaches such as the HM Treasury Five Case Model.
• Business analysis and/or applying Continuous Improvement methodologies.
• Identifying, assessing and implementing improved ways of working, with a strong focus on efficiency, innovation and quality.
• Working with a variety of internal and external stakeholders to solve complex business problems and support effective decision-making.

A degree or equivalent qualification would be desirable but is not essential. An APM Practitioner qualification would also be beneficial.

Benefits

• 9-day working fortnight – meaning you get every other Friday off work, in addition to 270 hours of annual leave.
• Market leading contributory pension scheme (we will pay between 9% and 13% of your pensionable pay depending on your contributions).
• Family friendly policies: Maternity Leave - 39 Weeks Full Pay and Paternity Leave - 4 Weeks Full Pay.
• Opportunities for Professional Career Development including funding for annual membership of a relevant professional body.
• Employee Assistance Programme and Occupational Health Services.
• Life Assurance (4 x annual salary).
• Discounts – access to savings on a wide range of everyday spending.
• Special Leave Policy including paid time off for volunteering, public service (including reserve forces) and caring.

The 'Working at AWE' page on our website is where you can find full details in the 'AWE Benefits Guide'.

Hybrid working

Hybrid working is available for this role on an informal, non-contractual basis. Typically [2-3] days onsite per week.

Important things you need to know

You will need to obtain and maintain the necessary security clearance for the role. This will be funded by AWE. The nature of our work does mean you need to be a British Citizen who has been resident in the UK for the past 5 years in order to apply for SC clearance and 10 years for DV. We want you to feel comfortable and able to shine during our recruitment process. Please let us know on your application form if you need any adjustments/accommodations during the process. Our interviews typically take place over Teams and for most roles are a 1 stage process. Our ambition is to create workplaces where we recognise and celebrate differences, encourage diverse contributions and our employees feel able to be themselves at work. We strive to create a genuine culture of openness and inclusion and encourage diverse applicants. Any inclusion information you provide will be stored in accordance with GDPR and kept separate from your application form and CV, and the information will not be shared with anyone involved in interviewing or making hiring decisions. Please note that you must be a British Citizen to apply for a role with us. We are at the start of a once in a generation – possibly two generations – programme to design and produce a replacement warhead for the UK’s continuous at sea deterrent. We will do this while continuing to deliver the Trident programme as well as managing ambitious state‑of‑the‑art capital and construction projects – some of which have never been done before. Find out more on our website.