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Billing Specialist I at Amentum

Amentum
August 03, 2026
Full-time
On-site
Regular Responsibilities Include:


Preparing detailed invoice packages with appropriate documentation and backup, as per standing policies and procedures
Preparing and reconciling labor postings for T&M billing
Preparing correcting Journal Entries for billing
Classifying billable vs. non-billable costs, based on program standards
Validating accuracy of system transactions
Research of old transactions for billing
Detailed unbilled analysis
AR aging analysis
Keeping accurate and complete records and tracking invoice status
Following up with field and US based teams on invoice and cost status
Timely rework of invoice rejections
Review and tracking of contract funding
Response to audit requests, as necessary
Verification, cost allocation and receiving of subcontracts' invoices.
Other program accounting and billing work, as directed.


Education and Certification Requirements



Bachelor's Degree in Accounting, Finance, or Business



Work Experience Requirement


3-5+ in an Accounting or Finance related field
At least 2 Years in an Accounting-specific function


Knowledge, Skills and Abilities Requirements:

Language Skills:



Strong English communication skills, both written and oral



Mathematical Skills:



Advanced Math skills (University level)



Reasoning Abilities:

Ability to define problems, collect and analyze data, establish facts and propose solutions

Ability to exercise sound judgement and make decisions independently

Other Knowledge, Skills and Abilities:


Have strong MS Office skills, especially in Excel and Word
Have strong written and verbal English communication skills
Have the ability to work through problems to completion
Be able to follow and accurately document processes and procedures
Have strong analytical skills
Be very detail oriented
Have experience with Microsoft Dynamics, Cost Point experience is a plus

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