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NMC&A Accountant (Senior Safeguards & Security Specialist)

Mission Support and Test Services
Mercury, NV Full Time
POSTED ON 5/21/2026 CLOSED ON 6/13/2026

What are the responsibilities and job description for the NMC&A Accountant (Senior Safeguards & Security Specialist) position at Mission Support and Test Services?

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.

Benefits:

Pension Plan, Health Insurance, Vacation & Paid Time Off

Salary : $80,579 - $120,869

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Job openings at Mission Support and Test Services

  • Mission Support and Test Services Las Vegas, NV
  • Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administ... more
  • 1 Day Ago

  • Mission Support and Test Services Mercury, NV
  • Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administ... more
  • 1 Day Ago

  • Mission Support and Test Services Mercury, NV
  • Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administ... more
  • 1 Day Ago

  • Mission Support and Test Services Mercury, NV
  • Mission Support and Test Services, LLC (MSTS) manages and operates the Nevada National Security Site (NNSS) for the U.S. National Nuclear Security Administ... more
  • 1 Day Ago


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