Amentum is a global leader in advanced engineering and innovative technology solutions, trusted by the United States and its allies to address their most significant and complex challenges in science, security and sustainability. Headquartered in Chantilly, Virginia, we have approximately 50,000 employees in more than 70 countries across all 7 continents.
Amentum is seeking an HR Services Coordinator to contribute to the success of the Human Resources Shared Services and Data Management function, focused in the areas of end user support, data entry and audits. This individual will handle confidential employee data and must demonstrate the professionalism and integrity required for such a sensitive position. The role requires analytical ability and creativity to solve challenges in an efficient and minimally disruptive way. This position requires regular communication with the HRIS and other HR support teams. This position is approved for US remote-telework and US Citizenship is required.
Key Responsibilities:
- Executing, validating, and auditing complex HR transactions in ADP and Workday, ensuring data quality and integrity compliance with internal protocols
- Overseeing technical execution of employee lifecycle processes such as onboarding, transfers, promotions, terminations, compensation actions, etc., ensuring effective operations
- Generating reports and auditing data to ensure data quality and integrity
- Addressing escalated inquiries and technical HRIS issues
- Answering routine inquiries concerning HR issues
- Collaborating closely with internal groups to ensure accurate project set-up in Workday
- Conducting periodic audits and reconciliation exercises with ADP and Costpoint to validate data is in sync between systems
- Testing of new HRIS functionality
- Providing training to end users as needed
- Assisting with personnel file request (i.e. legal subpoena request)
- Handling verbal and written employment and salary verification requests for third parties, current or former employees on an as-needed basis (i.e. lending verification, immigration letters, legal request, etc.)
- Processing unemployment claims and hearing notifications in coordination with HR Business Partners in Experian Employer Services (Hamlet).
- Completing I-9 (Employment Eligibility Verification) used to verify the identity and work authorization of new employees
- Performing other duties as assigned
Key Competencies, Knowledge, Skills and Abilities:
- Acute attention to detail required, well-organized & demonstrated ability to prioritize multiple-tasks and achieve desired results within set deadlines.
- Cooperative attitude with team-oriented disposition with the ability to work independently.
- Ability to effectively communicate and collaborate effectively with a diverse range of people and job functions, including written and verbal communications.
- Candidate must possess the highest level of work ethics and integrity and exhibit professional etiquette with proven ability to handle confidential information.
- Must possess a high level of judgment and discretion.
- Must be able to demonstrate a sense of urgency with time sensitive matters and projects.
Minimum Requirements:
- High school diploma or equivalent required.
- 3+ years relevant HR administrative/support role experience required
- Experience in Microsoft Excel, Word, PowerPoint, and Outlook
- US Citizenship is required.
Desired Qualifications, Knowledge, Skills and Abilities:
- Experience with Workday, ADP, and Deltek Costpoint, or comparable complex system strongly preferred
- ServiceNow or case and knowledge management experience preferred
- Government contracting experience preferred
Compensation Details:
$22 - $28
The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.
Benefits Overview:
Our health and welfare benefits are designed to support you and your priorities. Offerings include:
Health, dental, and vision insurance
Paid time off and holidays
Retirement benefits (including 401(k) matching)
Educational reimbursement
Parental leave
Employee stock purchase plan
Tax-saving options
Disability and life insurance
Pet insurance
Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.
Original Posting:
08/17/2026 - Until FilledAmentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.
Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.
Skills Required
- High school diploma or equivalent
- 3+ years HR administrative/support experience
- Experience with Microsoft Excel, Word, PowerPoint, Outlook
- US Citizenship
- Experience with Workday, ADP, Deltek Costpoint or comparable HRIS
- ServiceNow or case/knowledge management experience
- Government contracting experience
- Ability to handle confidential employee data with high judgment and discretion
Amentum Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Amentum and has not been reviewed or approved by Amentum.
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Healthcare Strength — Healthcare offerings are described as comprehensive, with medical, dental, and vision plans and multiple PPO/HSA options. Mental health support via an employee assistance program and other wellness resources is also included in the benefits mix.
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Retirement Support — Retirement support is positioned as a meaningful part of total rewards through a 401(k) plan with employer matching. Profit-sharing contributions and immediate or near-term vesting in some cases further strengthen the retirement value proposition.
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Leave & Time Off Breadth — Time-off benefits are presented as solid for the sector, including tiered PTO accrual by tenure and a set of paid holidays. Role-dependent flexible or remote work options and leave programs add to perceived work-life support.
Amentum Insights
What We Do
Amentum is a premier global technical and engineering services partner supporting critical programs of national significance across defense, security, intelligence, energy, and environment. We draw from a century-old heritage of operational excellence, mission focus, and successful execution underpinned by a strong culture of safety and ethics. Headquartered in Germantown, Md., we employ more than 20,000 people in 48 states and 28 foreign countries and territories. Visit us at amentum.com to explore how we deliver excellence for our customers’ most vital missions.









