Senior Payroll & Benefits Specialist - Govt Contractor

Aptive; Alexandria (VA); On-site; USD 90,000 - 130,000; Full time

Job summary

Aptive is hiring a Payroll & Benefits Administrator to lead payroll operations and benefits administration in a dynamic, multi-state government contracting environment in Alexandria, VA. The role ensures accurate, compliant payroll processing across biweekly and semi-monthly cycles with strict financial oversight.

The position requires extensive experience with Unanet and ADP Workforce Now for payroll calculations and benefits administration, with an extreme focus on detail in a quantitative

Qualifications

• Experience with ADP Workforce Now and Unanet for a federal government contractor.
• 5+ years of progressive payroll experience, including full-cycle payroll processing.
• Experience with Service Contract Act (SCA) compliance and fringe/H&W administration.
• Experience managing benefits vendors and conducting complex invoice reconciliations.
• Strong understanding of payroll accounting, reconciliations, and financial controls.

Responsibilities

• Lead full-cycle payroll processing for salaried, hourly, and contract employees across biweekly and semi-monthly pay cycles.
• Ensure payroll is processed accurately and in compliance with federal, state, and local regulations.
• Administer payroll tax filings, garnishments, deductions, statutory remittances, and year-end reporting (W-2s, 1099s).
• Reconcile payroll to the general ledger and project cost structures within Unanet, ensuring alignment with financial reporting.
• Maintain payroll system integrity across ADP and Unanet, including audits of data accuracy and system updates.
• Support internal and external audits, ensuring documentation is complete, accurate, and audit-ready.

Skills

ADP Workforce Now

Unanet

Payroll processing

Financial controls

Education

Bachelor’s degree in Accounting, Finance, HR, or related field

Job description

Aptive is hiring a Payroll & Benefits Administrator to lead payroll operations and benefits administration in a dynamic, multi-state government contracting environment in Alexandria, VA. The role ensures accurate, compliant payroll processing across biweekly and semi-monthly cycles with strict financial oversight.

The position requires extensive experience with Unanet and ADP Workforce Now for payroll calculations and benefits administration, with an extreme focus on detail in a quantitative