Billing Specialist

Job Title: Billing Specialist II (Contract Billing)

Job Description

The Billing Specialist II is an experienced contract billing professional responsible for executing high-volume, complex billing for a diverse portfolio of contracts. This role prepares accurate invoices for multiple contract types, validates cost data, supports audits, and ensures full compliance with contract terms, cost principles, and internal controls. The position is ideal for someone who thrives in a fast-paced, audit-driven environment and wants to contribute directly to cash flow, financial performance, and strong customer relationships.

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 accuracy, allowability, and alignment with contractual terms, cost principles, and compliance frameworks.

• Reconcile billed amounts to project financial reports, Project Cost Reports, general ledger (GL) data, and supporting documentation to ensure consistency and accuracy.

• Compile detailed invoice packages, including all required supporting documentation, for internal review, customer submission, and audit purposes.

• Maintain and update billing schedules, invoicing matrices, project setup records, Billing Matrices, Project Setup Checklists, and contract-specific billing schedules.

• Manage high-volume billing cycles, 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 and outstanding customer balances.

• Maintain organized, audit-ready billing documentation and accurate invoice archives for all assigned contracts and programs.

• Prepare complete invoice support packages for internal and external auditors, demonstrating compliance with established billing procedures and internal controls.

• Follow established departmental desk procedures, internal controls, and compliance requirements to ensure consistency and reduce billing risk.

• Collaborate closely with contracts, program and project management, finance, pricing, and operations teams to ensure accurate billing setup, execution, and contract closeout.

• Resolve billing issues related to contract modifications, funding changes, revenue configuration, and collection activities in coordination with cross-functional partners.

• Support process improvement initiatives by identifying opportunities to streamline billing workflows and contribute to system enhancements.

• Leverage ERP systems to manage billing, general ledger and project ledger interactions, reporting, and project setup in support of contract billing operations.

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 functionality, general ledger (GL) and project ledger (PL) interactions, reporting, and project setup.

• Proven experience preparing detailed, audit-ready invoice packages and posting billing information into ERP systems.

• Working knowledge of standard billing requirements, cost principles, and compliance frameworks relevant to contract billing.

• Strong reconciliation, analytical, and problem-solving skills, with the ability to validate costs against Project Cost Reports, GL data, and other financial reports.

• Demonstrated ability to manage high-volume billing cycles with strict monthly deadlines, handling approximately 150-250 billings per week.

• Experience supporting audits and producing complete billing documentation for internal and external reviewers.

• Advanced Excel proficiency, including the ability to work with complex spreadsheets and data sets.

• Familiarity with reporting tools, contract lifecycle systems, or data warehouse environments used in financial and billing operations.

• Hands-on experience with government billing and contract billing across industries such as aerospace, defense, manufacturing, or medical billing.

• Strong invoicing and analytical skills, including the ability to put together comprehensive billing packages and ensure accurate posting in systems.

Additional Skills & Qualifications

• Experience billing complex contract structures and preparing Progress Payment submissions.

• Understanding of indirect rate adjustments and how they impact billing and revenue recognition.

• Background in contract financial operations, revenue recognition, or project lifecycle processes.

• Experience with electronic invoice submission platforms and multi-line billing environments.

• Bachelor's degree in Accounting, Finance, Business, or a related field.

• Experience with medical billing and coding, aerospace billing, manufacturing billing, or government contract billing.

• Ability to work on innovative, mission-driven projects that have real-world impact.

• Interest in contributing to process improvements and supporting enhancements to billing and financial systems.

• Ability to collaborate effectively with cross-functional teams, including contracts, program management, finance, pricing, and operations.

Work Environment

This position is based on-site in an office environment that supports complex contract billing operations. You will work with ERP systems, Excel, reporting tools, contract lifecycle platforms, electronic invoice submission systems, and data warehouse environments as part of daily responsibilities. The work setting is fast-paced, audit-driven, and focused on accuracy, compliance, and timely billing. You will collaborate closely with finance, contracts, program management, pricing, and operations teams in a professional, inclusive culture that values teamwork, diversity of thought, and bold ideas. The organization offers opportunities for mentorship, training, and career advancement, along with competitive compensation and comprehensive benefits. Employees are encouraged to participate in community engagement and social impact initiatives as part of a stable, respected organization recognized for excellence and reliability. Attire is typical professional office dress appropriate for a corporate finance and billing environment.

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 Jul 20, 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.