Fractional Payroll Specialist (Part-Time | Hybrid) Job at Mosaic Human Capital Solutions, San Antonio, TX

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  • Mosaic Human Capital Solutions
  • San Antonio, TX

Job Description

About the Role:

Mosaic Human Capital Solutions is expanding and seeking a Fractional Payroll Specialist to join our growing team. In this role, you’ll be deployed to support clients, primarily small to mid-sized businesses, with end-to-end payroll administration and process improvement across payroll and HR functions .

This is a part-time, hybrid position offering significant flexibility, but candidates must reside in the San Antonio, TX area for occasional onsite work with clients.

Key Responsibilities:

  • Manage and process client payrolls accurately and on time using ADP or similar systems ; ensure proper handling of deductions, taxes, and reporting.
  • Evaluate existing payroll processes (many of which may be manual) and recommend improvements to enhance accuracy, efficiency, and compliance.
  • Serve as a liaison between clients and Mosaic to provide responsive, consultative HR/payroll support.
  • Assist with onboarding, HRIS updates, and other HR administrative tasks as needed.
  • Stay up to date with applicable federal and state employment laws and payroll regulations.
  • Provide basic training and support to client HR/payroll contacts on system use and improved workflows.

Required Qualifications:

  • San Antonio, TX-based, with the ability to travel locally to client sites when needed.
  • 3+ years of hands-on payroll experience , including direct use of ADP or comparable platforms.
  • Strong understanding of payroll fundamentals, including benefit deductions, garnishments, tax filings, and wage/hour compliance.
  • Proven ability to identify inefficiencies in manual payroll processes and implement improvements.
  • Excellent organizational skills, attention to detail, and ability to manage multiple client accounts.
  • Strong interpersonal skills and comfort working directly with client stakeholders.

Preferred:

  • Experience working in a consulting or multi-client environment.
  • Familiarity with broader HR functions (e.g., benefits administration, onboarding, HRIS).

Position Details:

  • Part-time: ~20–30 hours/week to start, with potential to grow over time (if desired).
  • Hybrid: Mix of remote work and local travel to client sites.
  • Flexibility in scheduling with deliverables-based accountability.

Job Tags

Temporary work, Part time, Local area,

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