Human Resources and Benefits Assistant

Ellenhorn LLC; Arlington (MA); On-site; USD 50,000 - 70,000; Full time

Job summary

Ellenhorn LLC in Arlington, MA is hiring a Human Resources and Benefits Assistant to provide hands‑on administrative support across HR, focusing on benefits and day‑to‑day processes. You will work closely with the Senior HR Manager to manage enrollments, records, and compliance while delivering thoughtful service to employees.

This full‑time, in‑office role supports onboarding logistics, performance evaluations, data management, and audit assistance as the organization grows across three states.

Qualifications

• Associate degree or higher with 2+ years in administrative HR support including benefits.
• Experience with Paylocity or similar HRIS systems.
• Proficiency in Google Workspace and document management.
• Strong attention to detail with ability to manage multiple timelines.
• Collaborative, cross-team communication and support orientation.

Responsibilities

• Benefits administration: respond to questions, enrollments, changes, terminations.
• Support onboarding/offboarding and performance review processes.
• Maintain benefits files and compliance documentation.
• Update and organize employee records with data entry accuracy.
• Provide general HR administrative support to the team.
• Handle sensitive information with discretion and professionalism.
• Assist with annual compliance training tracking and organization.

Skills

Paylocity

Google Workspace

Attention to detail

Highly organized

Collaboration

Education

Associate degree or higher

Tools

Paylocity

Job description

Description

About The Collective:

The Silver Hill Collective is new, but its programs aren’t. Ellenhorn has been treating the most difficult-to-engage psychiatric clients in the community for twenty years. Accord is pioneering metabolic approaches to mental health. Silver Hill New York is integrating technology into care that informs treatment. We're bringing them together under shared infrastructure and building the Human Resources team to meet the needs of the growing group.

Position Summary:

The Human Resources and Benefits Assistant provides hands on administrative and operational support across the HR function, focusing on benefits administration and day to day HR processes. Working closely with the Senior HR Manager, the Human Resources and Benefits Assistant will support company benefits administration, key HR administrative processes, including onboarding logistics, performance evaluations, data management, and audit assistance.

This role is ideal for a detail oriented, service minded HR professional who enjoys keeping processes organized, supporting employees with care, and ensuring the behind the scenes details are handled thoughtfully and accurately. They are personable and responsive, able to build trust with employees while maintaining discretion and professionalism. They bring strong organizational skills, follow through, and can manage multiple priorities in a fast paced, evolving environment. Above all, this person is eager to contribute to a collaborative HR team, strengthen the employee experience, and grow alongside the organization as it continues to expand. This is a full time in office position in Arlington, Massachusetts.

Salary Range: Min $50,000 | Mid $60,000 | Max $70,000

About the Human Resources Team:

We are a collaborative HR team committed to supporting managers and employees across three states with recruitment, hiring, onboarding, retention, employee relations, annual performance reviews, and other key people processes. We work closely together to provide thoughtful, professional, and responsive support. We believe our employees deserve the same level of care and attention that our clinicians, doctors, and nurses provide to the individuals they serve. We approach our work with kindness, humor, curiosity, and a growth mindset, and we value strong collaboration in everything we do. Rooted in radical hospitality, we strive to create an employee experience that feels welcoming, respectful, and supportive at every touchpoint. We’re also excited for the expansion of our team, which will allow us to provide even more support to our employees and continue strengthening the employee experience.

Essential Functions and Responsibilities:

Benefits Administration

• Serve as point of contact for employee benefits questions (health, dental, vision, fsa)
• Process benefit enrollments, changes, and terminations
• Support annual open enrollment process
• Maintain benefits files and required compliance documentation

Human Resources Support

• Provide administrative assistance with onboarding and offboarding processes
• Support performance review management cycle
• Assist with annual compliance training tracking and organization
• Update employee records, including data entry and document organization
• Handle sensitive information with discretion and professionalism
• General administrative support to the HR team
• Perform other duties as assigned

Success Factors/Job Competencies:

• Highly organized and detail-oriented
• Strong sense of accountability and follow-through
• Collaborative and team-oriented
• Comfortable in a structured, support-focused role
• Able to build positive working relationships across teams
• Demonstrates flexibility and a positive, solutions-oriented approach
• Brings an open, curious, and adaptable mindset to an evolving team and business needs
• Commitment to company values and philosophy
• Excellent interpersonal and communication skills

Physical Demands and Work Environment:

• Physical Demands: While performing the duties of this job, the employee is often required to walk, sit, use hands to type, handle or feel objects, reach with hands and arms, bend, walk up and down stairs, talk, hear, and see.
• Work Environment: Most work is performed inside of the office setting.

Requirements

• Associate’s degree or higher with 2+ years of administrative HR focused support, including benefits administration (not just general HR support)
• Experience with Paylocity or similar HRIS
• Proficiency in Google Workspace
• Strong attention to detail and follow-through; comfortable with recurring, process-driven work
• Highly organized, detail-oriented, and comfortable managing multiple timelines
• Strong collaboration skills and comfort working within defined scopes and processes

Qualifications Desired:

• Experience working healthcare or mental health
• Experience in a high-volume administrative support role