Senior HR Generalist

Amentum; Fallon (NV); On-site; USD 80,000 - 85,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Paid time off and holidays

Retirement benefits (401(k) matching)

Educational reimbursement

Parental leave

Employee stock purchase plan

Disability and life insurance

Pet insurance

Job summary

Amentum seeks a Senior HR Generalist to provide high-level HR support across recruitment, onboarding, benefits, and compliance. Based at the Naval Air Station Fallon, this role partners with managers to foster employee relations, training, and engagement while upholding policies and regulations.

The ideal candidate brings 5+ years of HR generalist experience, proficiency with Workday/HRIS, and strong communication and confidentiality skills.

Qualifications

• Associate’s degree in HR, business administration, psychology, or related field; two years of HR experience may substitute each year of the degree.
• Minimum of five years of well-rounded HR generalist experience with employee relations, investigations, and conflict resolution.
• Strong experience in leave management including FMLA, ADA accommodations, and state-specific leaves, plus workers’ compensation coordination.
• Familiarity with HRIS systems, applicant tracking systems, and HR analytics.
• Proven ability to work in a fast-paced, customer-focused environment with strong organizational and prioritization skills.
• Track record of handling confidential information with sound judgment and discretion.
• Proficiency in HR tools and Microsoft Office (Excel, Word, PowerPoint).
• Valid driver’s license.

Responsibilities

• Recruitment and hiring: partner with program hiring managers, post jobs, coordinate interviews.
• Onboarding and orientation: manage new hire processing in Workday and benefits enrollment.
• Employee relations: address concerns, mediate conflicts, support sensitive workplace situations.
• Handle complex employee relations issues, conduct investigations, and recommend outcomes.
• Coach managers on performance management, documentation, and communication strategies.
• Collaborate with HR leadership to implement performance management tools.
• Respond to grievances and resolve in line with CBAs.
• Ensure compliance with federal, state, local laws and CBAs.
• Administer FMLA, ADA accommodations, state leaves, and workers’ compensation.
• Liaise with third-party administrators and corporate office.
• Support HR initiatives including performance reviews, merit increases, training, and benefits open enrollment.
• Leverage Workday and ATS to manage workflows and analyze data.
• Contribute to HR process improvements and HR files maintenance.
• Perform other duties as assigned.

Skills

HR Generalist

Leave Management

HRIS

Applicant Tracking Systems

HR Analytics

MS Office

Confidentiality

Driver's License

Education

Associate’s degree

Bachelor’s degree (Preferred)

Tools

Workday

Microsoft Office

Job description

The Senior HR Generalist is a key member of the HR team, responsible for providing high level effective professional support across a broad spectrum of human resource functions. This role manages critical aspect of the employee lifecycle, including recruitment, onboarding, benefit administration, compliance, employee relations and investigations, and other day-to-day HR operations. The Senior HR Generalist plays a vital role in maintaining a positive workplace culture and fostering employee engagement while ensuring organizational compliance with relevant regulations and policies.

Essential Responsibilities

• Recruitment and Hiring: Partners with program hiring managers to understand staffing needs, assist with job postings, coordinate interviews, and ensure seamless candidate experience.
• Onboarding and Orientation: Manage new hire processing in Workday, facilitate new hire orientation and guide employees through benefit enrollment and address questions. Introducing organizational policies and promoting the company culture to new hires.
• Employee Relations: Act as a trusted business partner for employees and managers by addressing concerns, mediating conflicts, and supporting sensitive workplace situations with professionalism and neutrality.
• Handle complex employee relations issues, conduct investigations, and recommend actionable outcomes.
• Provide coaching to managers on performance management, documentation, and effective communication strategies.
• Collaborate with program and HR leadership team to implement effective performance management strategies and tools.
• Partner with management team to respond to grievances and recommend resolution in compliance with the collective bargaining agreement.
• Ensure HR activities comply with federal, state, and local employment laws as well as the collective bargaining agreements.
• Administer FMLA, ADA accommodations, state-specific leaves, and workers’ compensation cases from initiation through return-to-work phases.
• Serves as an internal resource to solve more difficult problems related to functional HR areas.
• Serve as a liaison with third-party administrators and corporate office.
• Support corporate HR initiatives, including but not limited to, annual performance reviews, merit increases, training requirements, and benefits open enrollment.
• Leverage HR systems, including Workday and applicant tracking systems, to manage workflows, analyze data and support decision making.
• Contribute to ongoing HR process improvements and solutions to address complex challenges.
• Creates and maintains HR files and updates the information system in accordance with Standard Operating Procedures.
• Performs all other position-related duties as assigned or requested.

Minimum Qualifications

• Associate’s degree in human resources, business administration, psychology, or a related field. Two (2) years of experience in Human Resources may be substituted for each year of the associate’s degree.
• Minimum of five (5) years of well-rounded HR generalist experience, with demonstrated expertise in employee relations, investigations, and conflict resolution.
• Strong experience in leave management, including FMLA, ADA accommodations, and state-specific leaves, along with workers’ compensation coordination.
• Familiarity with HRIS systems, applicant tracking systems, and HR analytics.
• Proven ability to work in a fast-paced, customer-focused professional environment, with strong organizational and prioritization skills.
• A track record of managing sensitive, confidential information with sound judgment and discretion.
• General proficiency in HR-related tools and Microsoft Office Excel, Word, PowerPoint, etc.
• Must have a valid driver's license.

Preferred Qualifications

• Bachelor’s degree in human resource management or a related field.
• Experience using Workday.
• Previous experience working in a unionized environment and with collective bargaining agreements.
• Background in federal government contract or relevant industry.

Security & Clearance

• Ability to obtain and maintain a U.S government security clearance. Note: US Citizenship is required to obtain a U.S government security clearance.
• High School diploma or equivalent.
• Ability to work all assigned shifts and schedules as needed.
• A valid driver’s license is required.

Work Environment

• This position is based in office/on-site and aboard Naval Air Station Fallon Nevada.

This position offers the opportunity to make a meaningful impact on the organization by driving effective HR strategies, fostering a positive work environment, and promoting a strong workplace culture deeply rooted in respect, compliance, and collaboration.

Compensation Details

$80,000 - $85,000

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

Amentum 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.