Senior Accounting Specialist

Why Sabel Systems

Sabel Systems designs and delivers digital engineering ecosystems for DoW programs, enabling teams to connect data, systems, and personnel within secure, scalable environments. Our solutions empower programs to make faster decisions, close sustainment gaps, and meet the digital acquisition requirements.

Rather than simply proposing transformation, we implement and operate it at scale. Our method is clear: we orchestrate existing tools into a governing system of record, ensuring government ownership of infrastructure and traceable decisions. There’s no vendor lock, no proprietary baselines, and no need for ATO rebuilds during transitions.

Sabel Systems is redefining modern defense acquisition. If you seek to solve complex challenges at scale and want your work to directly accelerate military capability while reshaping the DoW’s approach to digital engineering, this is the place for you.

Complexity Simplified. Mission Amplified.

What You’ll Do

• Process vendor invoices in the accounts payable system, including three-way matching of PO, receipt, and invoice, approval routing, scheduled payment runs, and aging review

• Provide general accounting support, including preparing journal entries, performing account reconciliations and supporting month-end and year-end close

• Prepare and review monthly general ledger account reconciliations, including balance sheet accounts, investigating variances, clearing reconciling items, and documenting audit-ready support

• Review semi-monthly timesheets for accuracy, completeness, and proper approval

• Maintain labor journals, ensuring labor costs are accurately recorded, allocated to the correct accounts, and charged in line with the contract period of performance (PoP)

• Participate in the implementation, configuration, testing, and user training of the new procurement system and document related processes. Experience with Zip or Ivalua a plus

• Review and approve requisitions through system approval workflows, confirming funding availability, accuracy, and compliance with contract terms and FAR requirements

• Create, track, and monitor purchase orders in the system, verifying contract terms and approvals and reconciling PO balances against contract funding

• Serve as liaison between accounting and the project team during the new system implementation

• Maintain vendor master data and vendor relationships, including setup, status, and compliance documentation, to support timely delivery, accurate invoicing, and reliable payment

• Other duties and special projects as assigned