Amentum is a global leader in designing, engineering, and modernizing critical systems and programs of national importance across defense, security, intelligence, energy, and the environment. Driven by our commitment to creating a secure, sustainable future, we innovate as a collaborative team of passionate professionals dedicated to making a meaningful impact.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