Billing Specialist

Job Title: Contract Billing Specialist II Job Description The Contract Billing Specialist II plays a critical role in managing complex contract billing for high-visibility portfolios in a fast-paced, audit-driven environment. You will take ownership of billing execution for assigned programs, preparing accurate invoices across multiple contract types, validating cost data, supporting audits, and ensuring full compliance with contract terms and applicable accounting and billing regulations. Your work directly supports cash flow, financial performance, and strong relationships with key customers by maintaining precise billing records and partnering closely with cross-functional teams. Responsibilities + Prepare and submit invoices for a variety of contract types, including Cost-Reimbursable, Time & Materials (T&M), Firm Fixed Price (FFP), Milestone-based, Progress Payment, and Performance-based agreements, ensuring full compliance with contract requirements. + Validate billed costs for allowability, accuracy, and alignment with contractual terms, reconciling billed amounts to project cost reports, project financial reports, and general ledger (GL) data. + Compile and organize all required supporting documentation for each invoice, including detailed invoice packages, and ensure that billing matrices, project setup checklists, and contract-specific billing schedules are current and accurate. + Maintain billing schedules, invoicing matrices, project setup records, and related documentation to support timely and accurate billing cycles. + Manage high-volume billing cycles, typically handling approximately 150-250 billings per week, while meeting strict monthly deadlines. + Assist with monthly billed and unbilled accounts receivable reconciliations to support accurate financial reporting. + Partner with accounting teams to resolve cash application discrepancies and support collection efforts on aged receivables and outstanding customer balances. + Follow established billing procedures, internal controls, and departmental desk procedures to maintain compliance with standard billing requirements, cost principles, and audit frameworks. + Prepare complete, audit-ready invoice support packages for internal and external auditors and maintain organized invoice archives and contract billing records. + Work closely with contracts, program and project management, finance, pricing, and operations teams to ensure accurate billing setup, execution, and contract closeout. + Resolve billing and collection issues related to contract modifications, funding changes, revenue configuration, and other contract lifecycle updates. + Support contract financial operations by providing input on revenue recognition, indirect rate adjustments, and project lifecycle processes as they relate to billing. + Identify opportunities for process improvement and support system enhancements, including improvements to ERP billing processes, reporting tools, and electronic invoice submission platforms. Essential Skills + 1-3+ years of billing experience, ideally within complex contract environments such as government, aerospace/defense, manufacturing, or medical billing. + Strong expertise in ERP systems, including billing modules and interactions with general ledger (GL) and project ledger (PL), as well as reporting and project setup. + Proven experience preparing detailed invoice packages and supporting documentation for a variety of contract types. + Working knowledge of standard billing requirements, cost principles, and compliance frameworks applicable to contract billing. + Strong reconciliation, analytical, and problem-solving skills with the ability to validate costs against project cost reports, project financial reports, and GL data. + Demonstrated ability to manage high-volume billing cycles with strict monthly deadlines, handling 150-250 billings per week. + Experience supporting audits by producing complete, audit-ready billing documentation and invoice packages. + Advanced proficiency in Microsoft Excel for data analysis, reconciliations, and reporting. + Familiarity with reporting tools, contract lifecycle systems, or data warehouse environments used to support billing and financial operations. + Ability to collaborate effectively with cross-functional teams, including contracts, program management, finance, pricing, and operations, to ensure accurate billing and issue resolution. Additional Skills & Qualifications + Experience billing complex contract structures and preparing Progress Payment submissions for government or commercial contracts. + Understanding of indirect rate adjustments and their impact on contract billing and revenue recognition. + Background in contract financial operations, revenue recognition, or project lifecycle processes. + Experience with electronic invoice submission platforms and related billing technologies. + Bachelor's degree in Accounting, Finance, Business, or a related field is preferred. + Experience in government billing, aerospace and defense billing, manufacturing billing, or medical billing environments. + Ability to contribute to process improvement initiatives and support enhancements to ERP systems, reporting tools, and billing workflows. Work Environment This role operates in a fast-paced, audit-driven professional environment that focuses on complex contract billing and high-volume invoice processing. You will work extensively with ERP systems, general ledger and project ledger modules, Excel, reporting tools, contract lifecycle systems, data warehouses, and electronic invoice submission platforms. The position involves frequent collaboration with contracts, program and project management, finance, pricing, and operations teams, requiring clear communication and strong attention to detail. Work is typically performed during standard business hours with recurring monthly billing deadlines, audit activities, and accounts receivable reconciliations. The environment emphasizes accuracy, compliance, and organized documentation, with a professional office dress code appropriate for regular interaction with internal stakeholders and external auditors. Job Type & Location This is a Contract to Hire position based out of Sparks, NV. Pay and Benefits The pay range for this position is $20.00 - $23.00/hr. Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: - Medical, dental & vision - Critical Illness, Accident, and Hospital - 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available - Life Insurance (Voluntary Life & AD&D for the employee and dependents) - Short and long-term disability - Health Spending Account (HSA) - Transportation benefits - Employee Assistance Program - Time Off/Leave (PTO, Vacation or Sick Leave) Workplace Type This is a fully onsite position in Sparks,NV. Application Deadline This position is anticipated to close on Aug 17, 2026. About Aston Carter Aston Carter provides world-class corporate talent solutions to thousands of clients across the globe. Specialized in accounting, finance, human resources, talent acquisition, procurement, supply chain and select administrative professions, we extend the capabilities of industry-leading companies. We draw on our deep recruiting expertise and expansive network to meet the evolving needs of our clients and talent community with agility and excellence. With offices across the U.S., Canada, Asia Pacific and Europe, Aston Carter serves many of the Fortune 500. We are proud to be a ClearlyRated Best of Staffing® Platinum Award winner for both client and talent service. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email View email address on click.appcast.io (%View email address on click.appcast.io) for other accommodation options. San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records. Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability. Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.