Human Resources Assistant II

Responsibilities

• Provide clerical, administrative, and technical support to the Human Resources function.
• Maintain data integrity within the HRIS and ensure accurate, consistent data entry.
• Process personnel actions including hires, rehires, terminations, transfers, and pay changes.
• Coordinate onboarding logistics and prepare new hire paperwork and orientation sessions.
• Ensure compliance with I-9s, W-4s, and other employment contracts.
• Partner with Payroll to ensure timely submittal of employment changes and documentation.
• Serve as the primary point of contact for new employee inquiries.
• Assist with payroll and benefit deductions, reconciliations, and audits.

Requirements

• Associate’s degree in HR or a related field with 3 years of related experience.
• Proficient knowledge of Federal Acquisition Regulations (FAR) and labor laws.
• Advanced proficiency in Microsoft Excel, Microsoft Word, Workday, and ADP Payroll.
• Ability to pass and maintain a Secret Security Clearance.
• Valid State driver's license.
• Strong organizational, analytical, and interpersonal communication skills.

Preferred Qualifications

• 1–3 years of experience in a fast-paced, high-turnover environment.
• Previous experience working with union (represented) employees.
• Experience managing high-volume digital communication and rapid onboarding/offboarding cycles.
• PHR or SHRM-CP certification.

Benefits

• Health, dental, and vision insurance.
• Paid time off and holidays.
• Retirement benefits including 401(k) matching.
• Educational reimbursement and parental leave.
• Employee stock purchase plan.
• Disability, life, and pet insurance.

About the Company

Amentum delivers agile and steadfast solutions to the U.S. government and its allies. With more than 50,000 employees across seven continents, we tackle the world’s toughest challenges through a broad range of operational support services.