Manufacturing company that develops advanced laser and photonics technologies that strengthen next‑generation defense systems, and this role places you at the center of that mission. You’ll join a fast‑moving, highly collaborative team where technical excellence and precision directly support national security and the people who rely on these capabilities. If this sounds like a company you'd like to work for, apply now! Qualifications: 3+ years of experience in full-cycle payroll and accounts receivable experience Experience with multi-state payroll processing Knowledge of Paylocity, UKG or other third-party payroll processing software Comfortable with using MSOffice (Excel, PPT, Word, Outlook) Job Description: Payroll Administration Process weekly/biweekly payroll for all employees, ensuring accuracy in hours, earnings, deductions, and taxes. Maintain employee payroll records, including new hires, terminations, pay changes, and benefit deductions. Review timesheets for completeness and compliance with company policies and labor laws. Reconcile payroll reports and resolve discrepancies promptly. Prepare and distribute payroll-related documents such as pay stubs, summaries, and year-end forms (W‑2, 1099, etc.). Coordinate with HR and managers on payroll questions, adjustments, and compliance requirements. Billing & Accounts Receivable Generate and send customer invoices based on contracts, service logs, or project milestones. Monitor outstanding receivables, follow up on past‑due accounts, and document collection activities. Apply customer payments and reconcile accounts to ensure accurate aging reports. Assist with month-end closing tasks, including AR reporting and revenue reconciliation. Work with internal teams to resolve billing discrepancies or customer disputes. Cross-Functional Support Maintain accurate financial and payroll documentation for audits and compliance reviews. Support process improvements to streamline payroll and billing workflows. Provide backup support to the accounting team as needed. Job Type & Location This is a Contract to Hire position based out of Longmont, CO. Pay and Benefits The pay range for this position is $30.00 - $40.00/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 Longmont,CO. Application Deadline This position is anticipated to close on Mar 13, 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® double diamond 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 (%20astoncarteraccommodation@astoncarter.com) for other accommodation options.