Billing Analyst I

About the Role

Amentum is hiring a Billing Analyst I to support international programs. The company delivers integrated global mission services to the U.S. Government and allied partners, with work spanning training, logistics, operations, and maintenance in support of complex missions worldwide. Amentum has around 44,000 employees across more than 80 countries.

What You’ll Do

• Compile complete invoice packages, making sure the right supporting documents and back-up are attached in line with established policies and procedures.
• Prepare and balance labor postings for time-and-materials billing.
• Create corrective journal entries related to billing activities.
• Separate billable and non-billable expenses according to program guidelines.
• Check system transactions to confirm they are accurate.
• Investigate older transactions that affect billing.
• Perform detailed unbilled revenue analysis.
• Review accounts receivable aging.
• Maintain precise, complete records and monitor invoice progress.
• Coordinate with field teams and U.S.-based teams to confirm invoice and cost status.
• Handle invoice rejections promptly and rework them as needed.
• Track contract funding and related updates.
• Support audits by providing requested documentation and responses.
• Verify subcontractor invoices, allocate costs correctly, and process receipt of those invoices.
• Carry out other accounting and billing tasks as assigned by the program.

Education and Experience

• A bachelor’s degree in Accounting, Finance, or Business is required.
• Professional credentials such as CPA, ACCA, or an equivalent qualification are preferred.
• You should have 3–5+ years of experience in an accounting or finance environment.
• At least 2 years of experience in a billing-focused role is needed.
• Experience supporting international customers is considered an advantage.

Skills and Abilities

• Excellent written and spoken English.
• University-level math ability.
• Strong precision and the patience to investigate complex discrepancies.
• Solid problem-solving and data-analysis ability.
• Good judgment and the ability to make decisions independently.
• Strong Microsoft Office skills, especially Excel and Word.
• Advanced Excel capability, including VLOOKUP and Pivot Tables.
• Ability to work through issues until they are fully resolved.
• Capacity to document and follow processes accurately.
• Strong analytical mindset and keen attention to detail.
• Experience with Microsoft Dynamics; Costpoint is a plus.

Additional Information

Amentum is an equal opportunity employer and maintains a drug-free workplace.