HR Administrative Assistant (Part-Time)

Job Title: HR Administrative Assistant (Part-Time)

Industry: Nonprofit / Association

Location (city, state): Washington, DC

Assignment Type: Contract-to-hire (through September 30, with potential for extension or conversion)

Pay: $25–28/hr (depending on experience)

Benefits: This position is eligible for medical, dental, vision, and 401(k).

Work Schedule:

Part-time, 20–24 hours per week

Tuesday–Thursday, 9:30 AM – 5:30 PM

Hybrid schedule with two onsite days and one remote day

About Our Client:

Addison Group is partnering with our client, a mission-driven organization, to identify a Part-Time HR Administrative Assistant. This team operates in a collaborative, fast-moving environment and is seeking someone who can provide reliable day-to-day support across HR operations.

Job Description:

This is a hands-on HR support role responsible for keeping daily operations running efficiently. The position will assist with recruiting coordination, employee records management, onboarding and offboarding activities, and a variety of administrative and project-based tasks. The ideal candidate is highly organized, adaptable, and eager to contribute wherever needed.

Key Responsibilities:

Recruiting Support:

• Coordinate and schedule candidate interviews across teams
• Track and maintain recruiting-related expenses and invoices
• Provide general support for talent acquisition efforts

Onboarding & Offboarding:

• Prepare and maintain new hire documentation in both digital and physical systems
• Assist with coordinating exit processes and scheduling exit meetings
• Ensure employee records are accurate and up to date

HR Operations & Administrative Support:

• Provide day-to-day support to the HR team on ongoing initiatives and special projects
• Manage incoming calls and route inquiries appropriately
• Maintain office supplies and coordinate orders as needed
• Organize HR file storage systems and ensure documentation is properly maintained
• Support planning and execution of internal events such as trainings, meetings, and employee programs
• Take meeting notes and help track follow-ups and action items
• Process vendor invoices and review for accuracy, including benefits-related billing
• Assist with reporting on a recurring basis (daily, monthly, quarterly)
• Reconcile departmental expenses and resolve discrepancies
• Support general office logistics including mail distribution and special orders

Qualifications:

• 2+ years of administrative experience, ideally supporting HR or a similar function
• Experience with scheduling, event coordination, and office support
• Familiarity with HR systems such as ADP and applicant tracking systems (ATS), Greenhouse preferred
• Proficiency with Microsoft Office tools, including OneDrive and SharePoint
• Strong attention to detail with the ability to manage data, reporting, and billing tasks accurately
• Ability to coordinate logistics for meetings, events, and special projects
• Highly organized with the ability to manage files, supplies, and administrative processes
• Comfortable working in a fast-paced environment with shifting priorities
• Associate’s degree required

Additional Details:

• Start Date: Early May
• Interview Process: Single panel interview (virtual or onsite)
• Team Size: Small, collaborative HR team
• Opportunity for conversion based on performance and business needs
• Hourly schedule may have some flexibility based on availability

Perks:

• Opportunity to support a collaborative and mission-driven team
• Exposure to a wide range of HR functions and projects
• Flexible part-time schedule
• Potential for long-term opportunity

Addison Group is an Equal Opportunity Employer. Addison Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state and local laws. Addison Group complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities. Reasonable accommodation is available for qualified individuals with disabilities upon request.