Human Resource Business Partner Jobs in Reston, VA

Amentum is seeking a Human Resources Business Partner with an active TS/SCI with polygraph security clearance to join our team in Northern, VA. As an HRBP, you will act as a partner and consultant to the business.

• Acts as an initial employee/manager point of contact for routine HR activities: staffing, compensation, leave, recognition and morale, training and development, disciplinary matters, disputes and investigations, performance and talent management, and manager coaching.
• Facilitates communication between union representatives and management, serving as liaison to ensure both parties understand and adhere to the terms of the union contract.
• Monitors compliance with labor agreement terms, collaborating with management and union officials to ensure workplace policies align with the negotiated contract and addressing potential violations proactively.
• Partners with recruiting to facilitate onboarding actions, and with on‑site Security and corporate Employee Relations team on employee relations issues, investigations, and shared responsibilities.
• Monitors and tracks HR metrics for the assigned contract.
• Acts as a liaison between employees, leaders, and corporate departments including benefits and payroll.
• Provides proactive guidance to managers/employees on performance management, coaching, career development, counseling, or disciplinary actions, communications, training, employee relations issues, and interpretation of employment laws and company policies.
• Supports compliance efforts, including the communication, dissemination, and implementation of company policies and federal, state, and local employment laws.
• Supports program HR and HRIS activities, validating HRIS data accuracy, org‑chart alignment, Service Contract Act pay rate, wage, health & welfare changes, service bridge processing, vacation/leave info, and other key information; identifies errors and liaises with appropriate leader.
• Responds to employment‑related questions from applicants, employees, and supervisors, referring complex or sensitive matters to appropriate staff; conducts follow‑up to close inquiries.
• Supports program and company initiatives; tracks and prepares reports for analysis and distribution.
• Helps identify best practices and makes recommendations to improve the employee/manager experience, including new hire assimilation, training, and performance management.
• Drives change awareness by developing knowledge of trends, best practices, regulatory changes, and new technologies in human resources.
• Performs other duties as assigned.

• Bachelor’s degree in Human Resources, Business, or related field, or equivalent combination of education and experience.
• 2 years of relevant experience.
• Must work on site 5 days per week, 8 hours per day.
• Proficiency with MS Office.
• Must be a U.S. citizen and possess an active TS/SCI security clearance.

• Previous SCA/Union experience.
• Experience with government contracting.
• Working knowledge of WorkDay as the HRIS.

$90,000‑$110,000 USD. 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.

• 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

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, age, ancestry, U.S. 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.

If you need a reasonable accommodation for any part of the employment process, please contact us by email at TAOps@amentum.com and let us know the nature of your request and your contact information. Requests for accommodation will be considered on a case‑by‑case basis.