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Employee Relations - Principal Human Resources Specialist

Nevada National Security Sites
North Las Vegas, United Statesfull_timeVerifiedPosted 10 Mar 2026
💰 $155,522/yr($101,982/yr$155,522/yr)

About the role

Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administration (NNSA).  Our MISSION is to help ensure the security of the United States and its allies by providing high-hazard experimentation and incident response capabilities through operations, engineering, education, field, and integration services and by acting as environmental stewards to the Site’s Cold War legacy.  Our VISION is to be the user site of choice for large-scale, high-hazard, national security experimentation, with premier facilities and capabilities below ground, on the ground, and in the air. (See NNSS.gov for our unique capabilities.) Our 2,750+ professional, craft, and support employees are called upon to innovate, collaborate, and deliver on some of the more difficult nuclear security challenges facing the world today.   

  • MSTS offers our full-time employees highly competitive salaries and benefits packages including medical, dental, and vision; both a pension and a 401k; paid time off and 96 hours of paid holidays; relocation (if located more than 75 miles from work location); tuition assistance and reimbursement; and more.  
  • MSTS is a limited liability company consisting of Honeywell International Inc. (Honeywell), Jacobs Engineering Group Inc. (Jacobs), and HII Nuclear Inc.

The Employee Relations Investigations & Audit Specialist will support audits and investigations across all areas and all levels of MSTS and with primarily non-bargaining unit employees.  The Principal Human Resources Specialist will provide investigations on discrimination, harassment, and performance matters, capture findings, and provide out-briefings to ensure compliance with Company standards and expectations and the ability to recommend, design, and customize processes, procedures, and methodologies with relevant points of contact (POCs). Strong communication skills are imperative to this role as this person will interact with everyone from the executive office to individual contributors. This individual will need to work independently and exude confidence and professionalism. 

Key Responsibilities:

  • Provide expertise and recommendations in Employee Relations matters.
  • Provide investigatory expertise in responding to concerns and complaints with experience to include harassment, discrimination, employment issues, and resulting disciplinary actions.
  • Develop comprehensive internal reports on investigations.
  • Prepare audit reviews and offer recommendations based on findings and completes regular reports, as required.
  • Document information pertaining to investigative results including findings, opportunities, and observations.
  • Evaluate the overall efficiency and effectiveness of internal controls and risk areas in compliance with applicable process standards.
  • Coordinate and conduct investigations, and/or ad-hoc projects with minimal supervision and direction.
  • Assist leadership in the identification of problem areas and recommend remedial actions.
  • Exercise initiative and apply knowledge and experience to resolve problems where established procedures may not be specific.
  • Demonstrated knowledge on current employment law changes specifically in California, Nevada, New Mexico, and Maryland. 
  • Maintain strict confidentiality of all information concerning employee issues/concerns.
  • Participate in Disciplinary Action Review Board (DARB) meetings as appropriate.
  • Advise and counsel management regarding the interpretation and intent of Mission Support and Test Services LLC personnel policies and practices.
  • Provide counsel to employees who have work-related problems.
  • Interface with Legal, Internal Audit, and Staff Relations as needed.
  • Perform other related work as assigned by leadership.

Due to the nature of our work, US Citizenship is required for all positions.

 

  • Bachelor’s degree in related field and at least 8 years’ of professional level experience, or equivalent training and experience. 
    • Preferred: Bachelor’s degree in human resources or related field and at least 12 years of proven professional success in managing and conducting a high level of investigations and audits full-time, or equivalent training and experience.
  • Thorough Knowledge of Human Resources principles, EEO and AA Laws.
  • Proficient with standard concepts, proc

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Company

Nevada National Security Sites

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