Senior Billing Specialist

Sentar is proud to be an employee-owned company, fostering a culture of empowerment, collaboration, and innovation. Sentar is dedicated to developing the critical talent that the connected world demands to create solutions to address the convergence of cybersecurity, intelligence, analytics, and systems engineering. We invite you to join the team where you can build, innovate, and secure your career.

Sentar is seeking a Senior Billing Specialist in Huntsville, AL!

Role Description:

Sentar is seeking a detail-oriented and experienced Senior Billing Specialist to support billing and accounts receivable activities within a government contracting environment. This position is responsible for preparing, reviewing, and submitting accurate and timely invoices for federal and commercial contracts using Deltek Costpoint.

The ideal candidate has strong knowledge of government contract billing requirements, experience with multiple contract types, and the ability to interpret contract terms, funding documents, CLIN structures, indirect rates, and customer invoicing requirements. This individual will work closely with Program Management, Contracts, Project Accounting, Accounts Receivable, and other Accounting team members to resolve billing issues, reduce unbilled balances, support timely cash collection, and assist with contract closeout.

Essential Duties and Responsibilities

• Prepare, review, and submit accurate invoices for federal government contracts and subcontracts, as well as commercial contracts.
• Perform billing activities in Deltek Costpoint, including invoice generation, review, reconciliation, posting, and supporting-document preparation.
• Manage billing for a variety of contract types, including:
  • Cost Plus Fixed Fee (CPFF)
  • Time and Materials (T&M)
  • Firm Fixed Price (FFP)
  • Cost-reimbursable contracts
• Review contract terms, funding, ceilings, CLINs, labor categories, billing rates, indirect rates, fee calculations, and special billing instructions.
• Submit invoices through government and customer portals, such as PIEE/WAWF, IPP, and other agency-specific systems.
• Reconcile billing activity to project financial data, accounts receivable records, and the general ledger.
• Monitor unbilled receivables, billing backlog, funding limitations, and contract ceiling constraints.
• Research and resolve billing discrepancies, invoice rejections, payment delays, and customer inquiries.
• Coordinate with Program Managers, Contracts, Program Control, and Accounting to obtain required approvals and supporting documentation.
• Maintain complete and audit-ready billing files in accordance with company policies, contract requirements, and applicable government regulations.
• Support month-end and year-end close activities, including billing reconciliations and reporting.
• Assist with contract closeouts, final invoices, indirect rate adjustments, fee retainage tracking, and billing true-ups.
• Support internal, external, and government audits, including requests related to billing documentation and contract compliance.
• Identify and implement process improvements that increase billing accuracy, strengthen internal controls, and reduce invoice cycle time.
• Provide guidance and training to other staff performing billing functions and serve as a resource for complex billing matters.