Billing Specialist

Physical Sciences Inc. (PSI) is a 100% employee-owned research and development and manufacturing organization that develops cutting-edge technologies to meet the critical needs of our customers.

PSI seeks an experienced, well-qualified candidate for an on-site Billing Specialist role at its corporate office in Andover, MA. This role is ideal for a candidate who thrives in a fast-paced, audit-driven environment and is skilled in Deltek Costpoint or a comparable ERP system, government contract billing, FAR and DFARS requirements, and complex contract structures.

• Prepare and submit Cost, Time & Materials, and Firm Fixed Price invoices in compliance with contract terms and applicable FAR/DFARS requirements.
• Validate costs, reconcile invoices against project cost reports, and maintain complete supporting documentation.
• Prepare final invoices for contract closeout.
• Collaborate with Contracts and Program Management on project setup, funding updates, and contract modifications.
• Monitor and follow up on aged receivables, support collection efforts, and resolve cash application issues.
• Prepare monthly billed/unbilled accounts receivable reports and reconciliations.

• Associate’s degree in Accounting, Finance, or a related field, with 3–5 years of government contract billing experience. Equivalent experience may substitute for education, with at least 5 years of relevant experience required in lieu of a degree.
• Proficiency in Deltek Costpoint or a comparable ERP system, including billing, revenue recognition, GL/PL interactions, and project setup.
• Experience preparing government billing forms (SF1034/1035, SF1443), DD250 shipment documentation, and submitting invoices through WAWF/PIEE.
• Working knowledge of government contracting requirements, including FAR, DFARS, Cost Accounting Standards (CAS), and applicable government billing regulations.
• Experience supporting DCAA/DCMA audits and maintaining audit-ready documentation.
• Strong Excel, accounting, reconciliation, and financial analysis skills, including validating costs against project reports and understanding indirect rate adjustments.
• Ability to manage high-volume billing cycles and meet strict deadlines.
• Strong organizational, problem-solving, communication, and interpersonal skills, with the ability to work independently and collaboratively.

U.S. Citizenship is required.

PSI is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.

Pay Range: The estimated annual base salary range for this role is $61K–$73K
. The actual salary offered will depend on the candidate’s experience, education, and specialized skills.