Cost Modeller

About the Company

Join our Downer Professional Services team and play a key role in delivering complex defence and national security projects that safeguard Australia’s future.

Downer Professional Services comprises of three business units our Technical, Advisory, and Capability consulting practice, and Team Downer, which partners with CASG and NSSG as a major service provider to Defence. Together, we are a multi-disciplinary advisory and delivery partner of choice for clients across Defence and National Security.

We currently have an opportunity for a Cost Modeller in Canberra to work on Space SATCOM projects.

About the Role

This role offers a broad scope, with key role responsibilities including:

• Develop and maintain Defence-compliant cost models – build, refine and document cost baselines across WBS, schedules, resources and dependencies.
• Produce financial inputs for governance and approvals – support Investment Committee and multi-level submissions with accurate costing and justification artefacts.
• Analyse cost data and drive insights – leverage advanced Excel to validate assumptions, assess variance, and support decision-making.
• Apply Defence costing tools and frameworks – utilise CCT and align outputs with One Defence Capability System requirements.
• Engage stakeholders to shape cost inputs – collaborate across project teams to gather data, validate assumptions and build trusted relationships.

What You’ll Bring

• Familiarity with One Defence Capability System and the specific financial justifications required for all committee levels.
• Skilled in utilising advanced Microsoft Excel functions and formulas to process data.
• Capacity to engage with diverse stakeholder and build rapport.
• Familiarity with the Defence Capability Costing Tool (CCT).
• Preferable Accounting or Finance accreditation. Due to the nature of the work, you are required to currently hold and maintain an AGSVA Security clearance as required by the Commonwealth. In some instances, compliance with ITAR requirements may also be an inherent requirement.

More than anything, you’ll bring a strong work ethic, a positive attitude, and a commitment to delivering high-quality outcomes for our clients.

Why Downer Professional Services

At Downer Professional Services, we’re not just a workplace - we’re a business dedicated to contributing to the shaping of the future of defence in Australia. As the country’s only sovereign prime, we’re committed to making a real difference in protecting Australia’s interests.

What it means to belong at Downer Professional Services

• Meaningful work: Help to deliver critical Defence projects that protect Australia and shape its future.
• Professional development: Access career mapping, accelerated learning programs, and shared learning through our Communities of Practice.
• Great perks: Enjoy discounts on healthcare, retail, vehicles, and more through Perks@Downer.
• Veteran support: Up to 20 days of Reservist Leave to stay connected post-service.
• We actively celebrate diversity and inclusion and welcome people of all ages, genders, sexual orientations, cultures, abilities, and lived experiences.
• As a WORK180 Endorsed Employer, we support flexibility that works for your life, inclusive leadership that values your voice, and equitable access to opportunity so you can do your best work and bring your whole self to it.
• If you need support or adjustments through the recruitment process, just let us know, we’re here to help you put your best foot forward.

How to Apply

• If it feels like the right fit, apply - potential counts, and so do you.