Project Billing/Service Specialist

St. Louis, MO Job Description The Billing/Service Specialist manages accounts receivable and billing functions for multiple companies while supporting the service department to ensure consistent and accurate financial operations. This role processes a high volume of billings and service-related transactions, maintains detailed records, and works closely with internal teams and external partners in a legacy ERP environment. The position offers stable workload, opportunities for growth, and a strong emphasis on accuracy, organization, and professional communication. Responsibilities Manage accounts receivable and billing functions for multiple companies.Process time and materials (T&M) and contract billings accurately and on schedule.Update and maintain billing deadlines and billing requirements for various projects and customers.Submit invoices and hours in multiple online systems, ensuring completeness and accuracy.Perform invoice reconciliations to resolve discrepancies and maintain accurate records.Set up jobs, contracts, billing rate tables, and markup tables in the billing and ERP systems.Run, review, and distribute monthly reports related to billing, accounts receivable, and service activities.Process and log lien waivers in accordance with company procedures and project requirements.Process, review, and submit monthly and quarterly diversity payments as required by contracts or customers.Update and maintain the Service Aging Report to monitor outstanding service receivables.Submit service invoices in multiple online systems and ensure timely processing. Essential Skills High school diploma or equivalent.Background in accounts receivable and billing (construction industry)Comfort working in a legacy ERP environment and adapting to older processes during transition periods.Experience with AIA billing, particularly AIA G702 and G703 forms (highly desirable).Strong Excel skills for reporting, analysis, and billing-related tasks.Process improvement mindset, with the ability to identify and suggest enhancements to existing processes.Familiarity with Sage 300 Construction and Real Estate (Timberline) (preferred). Work Environment This role is 100% onsite with a regular schedule of 7:00 AM to 3:30 PM, providing a predictable daytime workday. You will work in an office environment as part of an accounting and administrative team that includes purchasing specialists, an accounts payable specialist, a payroll specialist, a billing specialist, and a service representative. Job Type & Location This is a Contract position based out of Saint Louis, MO. Pay And Benefits The pay range for this position is $28.00 - $29.00/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 Saint Louis,MO. Application Deadline This position is anticipated to close on Aug 8, 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 astoncarteraccommodation@astoncarter.com 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.