Senior Human Resources Manager

The Part-Time Senior Human Resources Manager will oversee and execute day-to-day HR operations, with deep ownership of payroll administration, HR systems (ADP), compliance, and employee lifecycle management. This is a mid-to-senior level role requiring both strategic judgment and strong execution skills in a lean environment.

• Own end-to-end payroll processing using ADP, ensuring accuracy, timeliness, and compliance
• Serve as primary administrator for ADP Workforce Now (or equivalent ADP platforms)
• Manage payroll audits, reconciliations, tax filings coordination, and issue resolution
• Maintain employee data integrity across HRIS and payroll systems

• Manage full employee lifecycle: onboarding, offboarding, job changes, and recordkeeping
• Ensure compliance with federal, state, and local employment laws and regulations
• Develop, implement, and maintain HR policies, procedures, and employee handbook
• Advise leadership on HR best practices, employee relations, and performance management
• Act as point of contact for employee HR inquiries and escalations

• Ensure compliance with wage and hour laws, benefits regulations, and employment standards
• Support audits, internal reviews, and documentation requests
• Maintain strict confidentiality of employee and company information

• Partner with leadership on workforce planning and organizational needs
• Provide guidance on employee relations matters, corrective actions, and terminations
• Recommend process improvements for HR efficiency and scalability

• 5+ years of progressive experience in Human Resources
• Extensive hands-on experience with ADP payroll systems
• Demonstrated expertise in U.S. payroll processing and employment law
• Strong attention to detail and high level of accountability
• Ability to work independently and manage priorities in a part-time role
• Excellent written and verbal communication skills

• SHRM-CP (Society for Human Resource Management – Certified Professional) or SHRM-SCP (Senior Certified Professional)
• PHR (Professional in Human Resources) or SPHR (Senior Professional in Human Resources)
• CPP (Certified Payroll Professional) a plus

• U.S. citizenship may be required if mandated by applicable law, regulation, or government contract