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.

Our Team:
The Air Combat Systems Program Office (ACSPO) manages the acquisition and sustainment of Australia’s F‑35A Lightning II capability. It provides Asset, Project, Financial, Engineering, and Business Management Support for F‑35 sustainment and associated AIR06000 project phases. 

About the Role:
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 under 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 enquiries.

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.

What’s Involved:

• Processing international supplier invoices with accuracy and correct coding
• Verify funds availability and escalate discrepancies
• Prepare and post journal entries for month‑end and adjustments
• Maintain compliance, audit‑ready financial documentation
• Collaborate to resolve invoice issues and improve processes
• Respond to internal and external AP queries professionally
• Support the integrity of internal controls through early identification of potential setbacks

Who we’re Looking For:
You’re someone who takes pride in precision, consistency, and maintains the financial integrity of business operations. You enjoy working with data, solving process‑related issues, and supporting a smooth end‑to‑end accounts payable workflow.

You are comfortable working both independently and as part of an integrated team, with the confidence to liaise with stakeholders at all levels and provide advice on finance processes when required.

You’ll Need:

• Experience in Accounts Payable or Transactional Finance
• Advanced Excel Skills
• High attention to detail and strong data‑entry skills
• Ability to manage volume work accurately and on time
• Confident communicator with strong stakeholder skills
• Able to work independently within an integrated team
• Process‑driven, organised, and committed to continuous improvement

Essential: Advanced Excel Skills
Required Security Clearance Level: NV1
Location: RAAF Base Williamtown - Near Newcastle Airport
Weekly Hours: Onsite - 40 Hours (Monday-Friday)

Compensation Details:

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance

• Paid time off and holidays

• Retirement benefits (including 401(k) matching)

• Educational reimbursement

• Parental leave

• Employee stock purchase plan

• Tax-saving options

• Disability and life insurance

• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed,  marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.