Demo

Senior Payroll Accountant

MANTECH
Herndon, VA Full Time
POSTED ON 9/19/2026
AVAILABLE BEFORE 10/18/2026
MANTECH seeks a motivated, career and customer-oriented Senior Payroll Accountant to join our team in Herndon VA. This position requires it to be on site at least 3 days a week.

The Senior Payroll Accountant will leverage their strong technical background and knowledge to ensure the accurate and timely processing of payroll within a dynamic government contracting environment. You will handle complex payroll tasks, provide guidance on regulations, and ensure strict compliance with all applicable laws including prevailing wage requirements and multi-state taxation.

Responsibilities Include But Are Not Limited To

  • Payroll Inquiries & Customer Support: Serve as the primary contact for payroll-related inquiries, managing Service Now tickets while providing expert guidance on company policies, timekeeping, and general payroll matters.
  • End-to-End Garnishment Management: Manage all garnishment processes, including Workday setups, ledger balancing, ADP vendor coordination, termination notices, and serving as the subject matter expert for garnishment-related matters.
  • On-Site Operations & Data Integrity: Manage daily on-site physical payroll mail receipt and organization, fully trained to execute full-cycle payroll processing back-up, audit tax reciprocity rules, review relocation expense lists to calculate taxable vs. non-taxable costs, process imputed income for tax withholdings, and maintain core data integrity(Payroll Inputs).
  • Lifecycle Events & Report Validations: Oversee employee lifecycle processing, including daily termination report reviews, final pay and off-cycle check process per state provisions, and daily validations for new hire, primary address change, and leave reports & resolve outstanding issues.
  • Accounting, Reconciliations & Statutory Reporting: Assist on labor distribution reconciliation, perform payroll tax deduction reconciliations against ADP invoices and provide ledgers, and manage statutory compliance filings including monthly labor statistics and quarterly multiple worksite reports.
  • Process Improvement & System Enhancements: Handle the development of payroll documentation as needed, implement process improvements, and test new payroll technologies to enhance compliance and operational efficiency.
  • Team Collaboration & Training: Provide comprehensive training and cross-functional support to junior staff and team members across general payroll, tax filings, garnishment and special projects as needed.

Minimum Qualifications

  • Bachelor's degree in accounting, finance, or a related field preferred with 5 years of progressively responsible experience in payroll within a government contracting environment.
  • Significant experience with multi-state payroll processing and Garnishment & tax compliance.
  • Proficiency in payroll software and timekeeping systems, Deltek Costpoint and/or Workday Payroll a must.
  • Advanced proficiency in Microsoft Excel, Word, and Adobe Acrobat.
  • Ability to manage payrolls for > 1500 employees
  • Strong analytical, problem-solving, and organizational skills.
  • Self-Starter with excellent communication and interpersonal skills to resolve complex timekeeping & Payroll discrepancies.

Preferred Qualifications

  • Certified Payroll Professional (CPP) certification.
  • Ability to manage payrolls for > 3000 employees

Clearance Requirements

  • US Citizenship

Physical Requirements

  • Must be able to remain in a stationary position 50% of the time.
  • Needs to occasionally move about inside the office to access file cabinets and office machinery.
  • Frequently communicates with co-workers, management, and customers, which may involve delivering presentations.
  • Be able to exchange accurate information about complex situations.

Salary.com Estimation for Senior Payroll Accountant in Herndon, VA
$88,561 to $110,815
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