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Senior Safeguards & Security Specialist (Accountable Nuclear Material Custodian)

Nevada National Security Sites
United Statesfull_timeVerifiedPosted 17 Dec 2025
💰 $118,248/yr($78,832/yr$118,248/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.

NNSS is seeking an experienced Safeguards & Security Specialist (Senior Safeguards & Security Specialist) to join the team as an Accountable Nuclear Material Custodian. The Specialist in the role will oversee the implementation and activities of a graded, effective safeguards program for control and accountability of nuclear material (NM).

 Key Responsibilities

  • Develop, coordinate, and implement facility and project specific plans and procedures. 
  • Provide oversight to ensure proper control and accountability of accountable NM at the Nevada National Security Site (NNSS) are complied with to include, but not limited to:
    • Proper safeguarding and storage of NM.
    • Proper documentation of transfers and receipts of materials; determination of need for and the proper application of tamper indicating devices.
    • Coordination and oversight of physical inventories. 
  • Participation in assessments/performance tests; review procedures and plans; obtain and maintain all training as assigned.
  • Coordinate and perform inventory activities and item reconciliation; perform backup duties for other Nuclear Material Custodians; and be trained in NM measurements to include verification and confirmation measurements. 
  • This position provides technical leadership and direction to include identifying, evaluating and compiling detailed technical information related to the mission and process in regard to accountable NM; interface with the management of the facility and/or operation in which accountable NM is located; troubleshoot anomalies related to accountable NM; inventory difference investigation, calculations, and resolution; assist in development of corrective actions for any identified deficiencies; participate in management reviews of issues involving accountable NM; develop and maintain appropriate documentation for assigned areas. Position interacts with a broad range of NNSS management and staff, national laboratory representatives, and various government agencies.
  • Performs other related work as assigned by supervisor or management.
  • Bachelor's degree in field related to the position or equivalent training and experience plus a minimum of 5 years of progressive related experience.
  • Ability to learn and understand the Local Area Nuclear Material Accounting System (LANMAS) is required. 
  • Participate in Human Reliability Program (HRP).  
  • Become and Radiological Worker I qualified within three months of start date.
  • Demonstrated success in providing customer support and interface. 
  • Experience in interacting with a broad range of management, staff, and various government agencies. 
  • Demonstrated effective interpersonal skills, and successful problem resolution and negotiation skills. Excellent oral and written communication skills. 
  • Ability to provide input on hardware and software requirements for Nuclear Material Control and Accountability (MC&A) systems at the NNSS is desired. 
  • Knowledge of NNSS programs and operations, familiarity with interpreting and implementing MSTS and Department of Energy policies, procedures, and practices and experience working in a multidisciplinary environment is desired. 
  • This position requires unescorted access to radiological and Material Access Areas. 
  • The primary work location will be at the Nevada National Security Site (located 65 miles northwest of Las Vegas, Nevada).
  • Work schedule will be 4/10s

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Company

Nevada National Security Sites

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