Billing Coordinator — Complex Invoicing & Receivables

Mathematica, Inc.; Washington (District of Columbia); Remote; USD 45,000 - 58,000; Full time

Job summary

Mathematica is seeking a Billing Coordinator in Washington, DC to manage client invoicing and collections across federal and private clients. You will collaborate with the Billing Manager, project teams, and accounting to ensure timely, accurate invoices.

The role emphasizes strong organization, attention to detail, and excellent communication, with an annual base salary between $45,000 and $58,000 and ESOP-driven culture.

Qualifications

• Associates degree in Accounting required; Bachelors preferred.
• Minimum of one year experience in a business environment.
• Strong organizational skills and attention to detail.
• Excellent written and verbal communication skills.
• Experience with job-costing and/or basic project accounting preferred.

Responsibilities

• Prepare and reconcile monthly invoices for federal government and private clients in accordance with contract requirements.
• Prepare annual invoices for Indirect Cost Rate Variances.
• Reconcile the Unbilled Receivables balances.
• Update and prepare a schedule of all projects needing final invoices.
• Prepare routine schedules and reports including journal entries and year-end supporting audit schedules.
• Review and reconcile accounting reports and records to source documents.
• Answer inquiries from internal project teams and clients.
• Manage accounts receivable aging and follow-up with clients for timely payments.

Job description

Mathematica is seeking a Billing Coordinator in Washington, DC to manage client invoicing and collections across federal and private clients. You will collaborate with the Billing Manager, project teams, and accounting to ensure timely, accurate invoices.

The role emphasizes strong organization, attention to detail, and excellent communication, with an annual base salary between $45,000 and $58,000 and ESOP-driven culture.