Mission Support & Test Services
Open positions
Safeguards & Security Specialist II - MC&A Accountant
As a Nuclear Material Accounting Specialist, you will play a critical role in ensuring the integrity and accuracy of nuclear material tracking at the Nevada National Security Site (NNSS). This position supports local,…
Senior Scientist - Physicist
MSTS seeks a Senior Scientist / Physicist for the High Energy Density Experiments (HEDE) Team at our Livermore Operations site to lead the design, development, and operational fielding of advanced diagnostics across…
DAF Deputy System Engineering Manager I
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…
IT Support Specialist II
The IT Support Specialist II provides intermediate-level technical support, system administration, and customer service across enterprise desktop, hardware, software, and peripheral environments. Functioning primarily…
Senior Project Manager
The Project Management Office within the IT Directorate is seeking an experienced Project Manager who will be responsible for leading multiple small-scale projects (under $5M TPC) through the full PMI project…
Principal Splunk Analyst (Principal Cyber Security Analyst)
MSTS is seeking an experienced candidate for the Principal Splunk Analyst (Principal Cyber Security Analyst). The Principal Splunk Analyst will play a critical role in safeguarding company infrastructure from cyber…
IT Support Specialist III
Are you a highly skilled and motivated IT professional passionate about delivering exceptional technical support and enhancing user productivity within a critical national security environment? The Information…
IT Support Specialist III
Are you a highly skilled and motivated IT professional passionate about delivering exceptional technical support and enhancing user productivity within a critical national security environment? The Information…
Senior Procurement Specialist (Commodity)
The Senior Procurement Specialist will provide guidance on preparation, solicitation, negotiation, award and administration of procurement documents and coordinate procurement activities with the requesting…
Manager I - IT Project Management and Compliance
MSTS is seeking a Manager I to manage the Project Management Office (PMO) and Compliance group within the Information Technology Department. Responsibilities Lead the organization’s Project Management Office, with a…
Principal Data Engineer (Prin Applications Analyst)
The Data Analytics team within our Information Technology department is seeking a Principal Data Engineer (Principal Applications Analyst). Key Responsibilities Participates in the development of standards, practices…
Principal Safeguards & Security Specialist - Technical Security Analyst
Mission Support & Test Services, LLC (MSTS) / Nevada National Security Sites (NNSS) is seeking a Principal Safeguards & Security Specialist (Technical Security Analyst) to serve as a high-level technical authority for…
Principal Emergency Response Specialist - OCC Duty Manager
Our Strategic Operations and Response Support (SOAR) team is seeking a highly skilled, detail-oriented, and proactive candidate to support the development, implementation, and sustainment of the Operations Command…
Senior Security Engineering Analyst (Senior Cyber Security Analyst)
MSTS is seeking an experienced candidate for Senior Cyber Security Analyst - Security Engineering. The Senior Cyber Security Analyst will play a critical role in safeguarding company infrastructure from cyber threats…
Supervisor II
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…
Director - Facility and Testbed Engineering
The Director of Facility and Testbed Engineering (F&TE) provides executive leadership, strategic direction, and operational management for the multi-disciplinary engineering organizations operating within nuclear and…
Manager II for Advanced Sources and Detectors
Join an elite team at the forefront of national security, conducting groundbreaking research and development in defense of our nation. The Nevada National Security Sites (NNSS) is seeking an exceptional candidate for a…
OpenText Systems Applications Analyst (Principal Applications Analyst)
Mission Support and Test Services (MSTS) is seeking an advanced OpenText Systems Applications Analyst to lead the architecture, configuration, integration, and lifecycle management of enterprise-grade content…
Safeguards & Security Specialist II - Information Systems Security Officer
The Safeguards & Security Specialist II will provide direct security support to the Santa Barbara, CA, Special Technologies Lab (STL) Field Intelligence Element Deputy Director and the Special Security Officer (SSO),…
Senior Project Manager
The Enhanced Capabilities for Subcritical Experiments (ECSE) Directorate is looking for a highly-motivated person with backgrounds in science, engineering, and/or project management to become a Control Account Manager…