Software Engineer II

Job Description

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.

MSTS is a limited liability company consisting of Honeywell International Inc., Jacobs Engineering Group Inc., and HII Nuclear Inc. We employ 2,750+ professional, craft, and support employees who innovate, collaborate, and deliver on some of the more difficult nuclear security challenges facing the world today.

• Highly competitive salaries and benefits packages including medical, dental, and vision
• Pension and 401(k) plans
• Paid time off and 96 paid holidays
• Relocation assistance (if located more than 75 miles from work location)
• Tuition assistance and reimbursement
• And more

• Collaborate with the team to define, design, and implement new features in analysis software
• Validate new software features against benchmark results derived from legacy analysis methods
• Assist in designing and implementing methods for metadata collection and preservation of analysis steps and input parameters
• Develop connections between existing software and new databases
• Collaborate with ongoing image and signal analysts to improve diagnostic studies with AI/ML techniques
• Assist in leading the implementation of innovative analysis improvements to existing processes
• Participate in code reviews to ensure code quality and share knowledge
• Implement and maintain software development best practices (e.g., version control, testing)
• Create and maintain technical documentation for software functionality and architecture
• Assist in developing and implementing robust data management practices to ensure data integrity, security, and accessibility for analysis
• Perform other duties assigned by Management

• Minimum
  
  Education and Experience
  • Bachelor’s degree in an engineering program accredited by the Accreditation Board for Engineering and Technology (ABET) required for Civil, Mechanical and Electrical engineering degrees
  • Or, Calculus‑based STEM bachelor’s degree in engineering
  • Plus 2 years of relevant experience in AI/ML model development, data analysis, or software engineering
• Preferred:
  Master’s degree in Computer Science, Data Science, or a related STEM field
• Experience in data management and database integration
• Familiarity with physics‑based modeling and simulation
• Proficiency in computer programming, especially Python
• Experience with machine learning and artificial intelligence, including language models
• Must have the ability to obtain security clearance and eventually hold a computer account on a classified (closed) network
• Excellent communication skills
• Highly organized with strong attention to detail
• Proven ability to collaborate effectively in a team environment
• Strong problem‑solving abilities
• Adaptability and willingness to learn new technologies
• Ability to manage time effectively and prioritize tasks
• Proactive and self‑motivated work ethic

• Work Location:
  
  Los Alamos, NM
• Work schedule will be 4/10s, Monday through Thursday (subject to change)
• Pre‑placement physical examination, including a drug screen, is required
• MSTS maintains a substance abuse policy that includes random drug testing
• Must possess a valid driver’s license

MSTS is required by DOE directive to conduct a pre‑employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Applicants offered employment with MSTS are also subject to a federal background investigation to meet the requirements for access to classified information or matter if…