Senior Billing Specialist

SOSiReston, VA
$62,953 - $130,749Hybrid

About The Position

SOSi is seeking a detail-oriented and proactive Senior Billing Specialist to become a key member of our finance team. In this role, you’ll own critical billing and accounts receivable functions that keep our operations running smoothly and efficiently. If you enjoy solving problems, improving processes, and working in a collaborative environment where your work truly matters—this is the opportunity for you.

Requirements

  • Bachelor’s degree in Accounting, Finance, Business, or related field, or equivalent experience.
  • Seven+ years of experience in billing, accounts receivable, or similar finance roles.
  • Experience with ERP systems such as Deltek Costpoint.
  • Advanced Excel skills (e.g., PivotTables, VLOOKUPs, complex reporting).
  • Strong proficiency with accounting systems and Microsoft Excel.
  • Exceptional attention to detail and accuracy.
  • Excellent communication skills and the ability to build positive relationships internally and externally.
  • Strong problem-solving and analytical skills.
  • Ability to manage multiple priorities and meet deadlines in a fast-paced environment.
  • A high level of integrity and professionalism when handling sensitive financial data.
  • A customer-first attitude and commitment to service excellence.

Responsibilities

  • Creating and delivering accurate, timely invoices based on contract terms and services provided.
  • Reconciling billed and unbilled receivables against the general ledger.
  • Managing contract close-outs, including final variance analysis and contract release.
  • Monitoring accounts receivable to ensure prompt collection and resolution of outstanding invoices.
  • Serving as a trusted point of contact for customers, resolving billing questions and discrepancies with professionalism.
  • Supporting and mentoring junior team members, helping elevate team performance.
  • Processing payments, applying transactions, and resolving account discrepancies.
  • Maintaining accurate billing records and customer accounts.
  • Preparing and sharing reports on billing and AR performance with leadership.
  • Ensuring compliance with company policies and industry standards.
  • Identifying opportunities to streamline processes and improve accuracy.
  • Collaborating cross-functionally with finance, sales, and other teams to achieve business goals.

Benefits

  • Opportunities for career growth and development.
  • The chance to make a meaningful impact on the organization’s financial success.
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