Finance officer

Amentum is a leader in global engineering, project management and solutions integration, trusted to modernise the most critical missions anywhere in the world. Driven to create a safer, smarter, cleaner world, we innovate as a team of inventive doers passionate about making a difference. Underpinned by a strong culture of ethics, safety and inclusivity. Amentum is fiercely committed to operational excellence and successful execution.

Are you seeking a career that offers a healthy work-life balance, a friendly company culture, and engagement with a supportive community? We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive and diverse team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

Amentum is proud to be an Equal Opportunity Employer, please refer to our Enterprise Agreement and www.fairwork.gov.au for more information.

Role Description:

This function will work under limited direction to perform and achieve moderately complex commercial tasks within an integrated workforce. They will liaise with stakeholders of all levels, building good working relationships and providing a point of contact for all inquiries as a finance officer relating to accounts payable.

The role is under Air Combat System Project Office (ACSPO) in conjunction with Air Force and civilian stakeholders. ACSPO has the primary mission of managing the long-term sustainment, maintenance, and logistics for Australia's fleet of F-35A Joint Strike Fighters (JSF), and life-Cycle Support. The office acts as the bridge between acquisition and ongoing operation, ensuring that the weapon systems, equipment, and platform capabilities are fully supported throughout their operational life.

The successful candidate can will based out of RAAF Base Williamtown, near Newcastle, NSW. The successful candidate will be supporting the already existing members within the Finance team at ACSPO.

Essential Requirements:

As a key member of the Finance team, you will play an important role in ensuring the accuracy, compliance, and efficiency of the organisation’s accounts payable function. Working in a limited direction, you will be responsible for processing a high volume of international invoices, maintaining financial data integrity, and acting as a primary point of contact for accounts payable inquiries. This role is ideal for someone who enjoys structured processes, detailed financial work, and supporting internal and external stakeholders through reliable, high‑quality service delivery.

• Process a large volume of international supplier invoices, ensuring accuracy, correct coding, and compliance with organisational and regulatory requirements.
• Verify funds availability prior to processing payments and escalate discrepancies where required.
• Prepare and post journal entries to support month‑end and ad‑hoc financial adjustments.
• Maintain accurate financial records and documentation to support audit and reporting requirements.
• Collaborate with team members to manage workflow, resolve invoice discrepancies, and support continuous improvement of transactional processes.
• Respond to internal and external queries related to accounts payable in a timely and professional manner.
• Contribute to maintaining strong internal controls by following established procedures and identifying potential issues.
• Clear verification of funds availability prior to payment processing, reducing the risk of overspend or budget discrepancies.
• Well prepared journal entries that support accurate financial reporting and month‑end close activities.
• Consistent compliance with financial policies, procedures, and audit requirements.
• Effective teamwork, contributing to a smooth workflow and shared accountability within the finance team.
• High attention to detail, resulting in reduced rework, fewer payment errors, and improved data integrity.
• Keeping the accounts payable workload on track.
• Reduced backlog of international invoices and improved payment cycle times.
• Strengthened transactional processes through reliable, consistent execution.
• Improved continuity and consistency.

Desirable Requirements:

• Resilience in a highly demanding, fast paced, complex and constantly evolving work environment.
• Strong Defence writing skills.
• Compliant and responsive to Acquisition and Sustainment, Procurement Reform, ERP and NDS requirements.
• Receipt of activity progress updates from project stakeholders.
• Timely delivery of tasks from ACS Branch.
• Strong Communication Skills.
• Demonstrated Stakeholder engagement skills.
• Ability to prioritise and adapt to changing work demand.
• Accurate and timely processing of a high volume of international invoices, with minimal errors and strong adherence to deadlines.
• Receipt of activity progress updates from project stakeholders.

Required Security Clearance Level:

Active NV1 Clearance.

Location:

RAAF Base Williamtown, Newcastle.

Weekly Hours:

Monday to Friday / 40 hours per week, with options for work from home on Friday's - depending on task requirements.