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PT Payroll Specialist

Job in Leesburg, Loudoun County, Virginia, 22075, USA
Listing for: customsoftwaresystems
Part Time position
Listed on 2026-09-04
Job specializations:
  • Accounting
    Payroll
Salary/Wage Range or Industry Benchmark: 25000 - 39000 USD Yearly USD 25000.00 39000.00 YEAR
Job Description & How to Apply Below

Custom Software Systems Inc. is seeking an experienced Part-Time ADP Payroll Specialist to support our growing organization. The ideal candidate has hands-on experience administering payroll in ADP and understands the practical requirements of expanding payroll operations into new states.
This is a hands-on role for someone who can independently manage payroll activities, troubleshoot issues, and ensure employees are paid accurately and on time. The right candidate will reside in a HUBZone.

Please confirm on the HUBZone map before applying: (Use the "Apply for this Job" box below).-zoom=4

Responsibilities
  • Process and administer payroll using ADP.
  • Maintain employee payroll records, deductions, tax elections, and other payroll information.
  • Process new hires, terminations, compensation changes, bonuses, and other payroll adjustments.
  • Set up payroll in a new state, including researching and coordinating applicable state payroll tax, withholding, unemployment, and employer registration requirements.
  • Coordinate with ADP to establish new-state payroll and tax accounts and ensure the state is properly configured in the payroll system.
  • Ensure accurate state and local tax withholding and reporting.
  • Review payroll reports and reconcile payroll data to identify and correct discrepancies.
  • Support federal, state, and local payroll tax filings and compliance.
  • Manage multi-state payroll requirements as the company expands.
  • Respond to employee questions regarding payroll, deductions, taxes, and pay statements.
  • Support year-end payroll activities, including W-2 preparation and reconciliation.
  • Maintain accurate payroll documentation and support internal and external audits.
  • Maintain confidentiality of employee compensation and personal information.
  • Coordinate with HR, accounting, and management on payroll-related matters.
  • Identify opportunities to improve payroll processes and controls.
Citizenship
  • US Citizenship
Required Qualifications
  • Demonstrated hands-on ADP payroll experience.
  • Experience processing payroll from start to finish.
  • Experience with multi-state payroll.
  • Experience adding or implementing payroll in a new state, including state registration, tax setup, withholding, and payroll-system configuration.
  • Strong understanding of federal and state payroll requirements.
  • Strong Excel skills and attention to detail.
  • Ability to work independently and manage confidential information.
  • Excellent organizational and problem-solving skills.
Preferred Qualifications
  • Experience with ADP Workforce Now.
  • Experience supporting a small or growing government contractor.
  • Experience establishing payroll in multiple states.
  • FPC or CPP certification.
  • HRIS/payroll implementation experience.
Compensation & Benefits
  • Wage Range: $18-28
    -Negotiable
  • General Benefits:
    Custom Software Systems, Inc. offers our employees a competitive benefits package that may include:
  • Health insurance plans
  • Health Savings Account (HSA)
  • Dental
  • Vision
  • Long-term disability
  • Short-term disability
  • Basic term life insurance
  • Supplemental term life insurance for employees, spouses, and dependents
  • Simple IRA
  • Parking/Commuting expense reimbursement
  • Training/Education
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