Working for MSTS

Attention Current MSTS Employees

This website is for non-MSTS employees only. Current MSTS employees should apply for internal jobs via the link on the company intranet.

As a condition of employment, all employees hired after Jan. 4, 2022, must be fully vaccinated against COVID-19 prior to their start date and must provide proof of vaccination, unless they qualify for a medical or religious exemption.

Thank you for your interest in working for Mission Support and Test Services, LLC (MSTS)!

MSTS is a limited liability company consisting of Honeywell International Inc., Jacobs Engineering Group Inc., and HII Nuclear, Inc. With some 2,200 employees, MSTS manages operations at the NNSS and at its related facilities and laboratories for the NNSA’s Nevada Field Office. The company has satellite offices in Los Alamos and Albuquerque, New Mexico; Santa Barbara and Livermore, California; Long Island, New York; and Washington, D.C., along with a small number of employees located in nine other states.

MSTS hires in a variety of career fields, including positions in engineering, science, technical support, project management, human resources, finance, procurement and administration.

job opportunities
student opportunities

Employee benefits include:

  • Medical, dental and vision insurance
  • Paid time off
  • Paid holidays
  • Life and accident insurance
  • Disability insurance
  • Employee 401(k) plan
  • Retirement plan
  • Flexible spending accounts
  • Employee educational training assistance

View a more detailed benefits summary here.

Medical provider/facility directories: