Part-time Payroll​/Benefits Assistant

Part-time Human Resources Associate (Fractional HR Support) for a company of ~70 employees. This hybrid role requires in-office presence 2 days per week (South of Boston).

With more than 30 years of experience, our firm is a recognized leader in delivering practical, science-based engineering and environmental solutions across the Northeast. Having completed over 15,000 projects across seven states, we pride ourselves on combining technical expertise with a commitment to creative, cost-effective problem-solving. Our team of professionals—spread across multiple office locations—supports a wide range of residential, commercial, industrial, and municipal clients.

We foster a collaborative and mission-driven environment where people take pride in the quality and integrity of their work.

We are seeking a part-time Human Resources professional to provide fractional HR support to our growing team of ~70 employees. This is an ideal opportunity for an experienced HR generalist or HR assistant looking to scale back while staying actively engaged in meaningful work. You will serve as a go-to resource for HR-related questions, oversee payroll and benefits administration, and help us build foundational HR processes as we scale.

• Serve as the main point of contact for employee HR and benefits-related questions
• Manage bi-weekly payroll using ADP
• Oversee benefits administration through our platform-based healthcare system (ACA-compliant, individual plan selection)
• Support onboarding/offboarding logistics in collaboration with department leads
• Maintain accurate employee records and help us begin implementation of a centralized HR system (we’re considering GoCo)
• Ensure compliance with employment laws and internal policies
• Assist with light reporting and audits as needed
• Collaborate with accounting team for payroll and benefits reconciliation

• 5+ years of experience in Human Resources, ideally in a small to mid-sized company
• Comfortable operating independently and advising leadership on best practices
• Experience with ADP payroll systems and general benefits administration
• Familiarity with ACA-compliant benefits platforms a plus
• Previous experience with or openness to working in environments without a formal HRIS
• Discreet, approachable, and able to manage confidential matters with professionalism
• Comfortable with a hybrid schedule (2 days/week in-office)

• Opportunity to make a meaningful impact without the demands of a full-time role
• Collaborative and supportive team culture

• Seniority level:
  Associate
• Employment type:
  
  Part-time
• Job function:
  Human Resources
• Industries:
  Human Resources Services