AMS PSR

On behalf of the MOD, we are looking for a Cost Modeller (Inside IR35) for a 11 Month (possible extension) contract based in Corsham a Minimum of 1 day per month for key meeting or as required for business needs.

The Ministry of Defence (MOD) is a central government department with a mission to protect our country and provide the ultimate guarantee of its security and independence, as well as helping to protect its values and interests abroad.

The MOD is one of the biggest public procurement organisations in Europe and the single largest customer for UK industry. It currently manages approximately £20 billion of spend on capital investments in equipment and infrastructure every year. Over the next decade the MOD is committed to spending over £190 billion on equipment and support. The MOD’s customers include both the armed forces and national security agencies, and it has a diverse range of requirements, including military fighting vehicles, education services, nuclear submarines and facilities management.

The MOD’s aim is to provide its armed forces with the best capabilities to enable them to protect the UK’s security and advance national interests, both now and in the long term.

To do this the MOD has an annual budget of almost £53 billion and a workforce comprising 197,000 people. of which 54,000 are civilians working for the UK MOD.

The work really matters; the MOD offers a range of engaging roles which have a direct impact on the quality of services they provide, in many locations across the UK. We support teams working in HR, Primary Health Care, Corporate Services, and many others.

The Cost Modeller will play a key role within the SKYNET/SATCOM Finance Team, supporting the development, validation and assurance of financial models across a portfolio of complex defence and satellite communication programmes.

The role involves delivering high‑quality cost modelling, approval planning support, financial analysis and decision‑support insights to ensure robust programme governance and value for money.

As a Cost Modeller, your main responsibilities will be

• Support approval planning activities to ensure financial artefacts align with programme governance timelines.
• Carry out verification and validation (V&V) checks on cost models, datasets, assumptions and financial inputs.
• Develop, maintain and refine feeder models to support cost estimates, investment decisions and business case preparation.
• Provide modelling and analytical support to SPC, including scenario modelling and sensitivity analysis.
• Identify efficiencies, cost‑saving opportunities and areas for financial optimisation across programmes.
• Assist with asset and inventory analysis, including lifecycle costing, depreciation modelling and utilisation assessment.
• Support contract closure by performing cost reconciliation, reviewing contractor financial submissions and validating final claims.
• Analyse financial commitments, risks and cost drivers to ensure accuracy and compliance with governance requirements.
• Work collaboratively with finance, commercial, engineering and assurance teams to ensure consistent, accurate cost modelling.
• Present cost modelling outputs and financial insights clearly to senior stakeholders.
• Review supplier and internal team cost submissions, challenging inconsistencies and identifying risks.
• Contribute to programme funding submissions and approvals documentation to support financial decision‑making.

Essential:

• Active SC Clearance (Sole British National)
• Qualified accountant (ACCA/CIMA/ICAEW) with strong financial analysis, cost modelling and governance experience.
• Knowledge of MOD In‑Year Management (IYM) processes, including in‑year forecasting, variance analysis and budget monitoring.
• Understanding of MOD Activity‑Based Costing (ABC) methodologies, cost driver analysis and value‑for‑money assessment.
• Familiarity with MOD approval routes and requirements, including business case stages, assurance expectations and governance frameworks.

Desirable:

• Experience of MOD inventory accounting.

Please be aware that this role can only be worked within the UK and not Overseas.

Disability Confident 

As a member of the Disability Confident Scheme, the MOD guarantees to interview all candidates who have a disability and who meet all the essential criteria for the vacancy. In cases where we have a high volume of candidates who have a disability who meet all the essential criteria, we will interview the best candidates from within that group.

This scheme encourages candidates with a disability and/or neurodivergence to apply. In exceptional circumstances, we may also need to apply the desirable criteria in our shortlisting process which may include holding active security clearance.

Armed Forces Covenant

The MOD guarantees to interview veterans or spouses / partners of military personnel who meet all the essential criteria for the vacancy. In cases where we have a high volume of ex-military candidates / military spouses or partners, who meet all of the essential criteria, we will interview the best candidates from within that group. In exceptional circumstances, we may also need to apply the desirable criteria in our shortlisting process which may include holding active security clearance.

In applying for this role, you acknowledge the following “this role falls in scope of the Off Payroll Working in the Public Sector legislation. Any rates of payment quoted will reflect the gross rate per day for the assignment and will be subject to appropriate taxes and statutory costs. As such the payment to the intermediary and your income resulting from this contract will be different.