Senior​/Principal R&D S&E, Computer Software Tester Engineer, Onsite

About Sandia

Sandia National Laboratories is the nation's premier science and engineering lab for national security and technology innovation, with teams of specialists focused on cutting-edge work in a broad array of areas. Some of the main reasons we love our jobs:

• Challenging work with amazing impact that contributes to security, peace, and freedom worldwide
• Extraordinary co-workers
• Some of the best tools, equipment, and research facilities in the world
• Career advancement and enrichment opportunities
• Flexible work arrangements for many positions include 9/80 (work 80 hours every two weeks, with every other Friday off) and 4/10 (work 4 ten-hour days each week) compressed workweeks, part-time work, and telecommuting (a mix of onsite work and working from home)
• Generous vacation, strong medical and other benefits, competitive 401k, learning opportunities, relocation assistance and amenities aimed at creating a solid work/life balance*

World-changing technologies. Life-changing careers. Learn more about Sandia at: http://(Use the "Apply for this Job" box below)..gov

* These benefits vary by job classification.

NW Arming and Fuzing Systems is seeking a self‑motivated, high‑caliber Tester Engineer with strong software, hardware, and electronics expertise to lead development, integration, sustainment of advanced test capabilities. This pivotal role emphasizes hands‑on implementation, system‑level integration, and continuous improvement of complex test environments supporting high‑impact nuclear deterrence programs. The position involves close collaboration across multidisciplinary teams to deliver robust, mission‑critical test solutions.

As a technical leader, you will be responsible for driving, developing, modifying, expanding test systems and capabilities that support both new development and existing weapon programs. You will also have the opportunity influencing and reshaping the tester realization strategy by leaning into Sandia's Strategic Goals of Be Future Ready. This position is ideal for someone who values ownership, technical influence, and continuous learning.

Expect a challenging, meaningful, and dynamic work environment where no two days are the same. Join us in making a significant impact!

• Software Development
  :
  Design, develop, and enhance software for both new and existing test systems utilizing your expertise in programming languages such as Python, C#, C++, and LabVIEW, among others. Ability to develop and work with the Test Stand.
• Next‑Generation Platforms
  :
  Spearhead the development of innovative software and hardware solutions for next‑generation tester platforms.
• Test Sequence Management
  :
  Create and modify test sequences for both new and existing testers, addressing, and debugging failures, and implementing software updates to facilitate field testing and troubleshooting.
• User Interface Design
  :
  Develop intuitive and user‑friendly Graphical User Interfaces (GUIs) that significantly improve usability and testing effectiveness.
• Data Analysis Algorithms
  :
  Design algorithms for parsing and evaluating test data to ensure accurate and efficient analysis.
• Cross‑Organizational Collaboration
  :
  Work collaboratively across organizations to develop modular software algorithms that are compatible with multiple tester platforms.
• Hardware Integration
  :
  Integrate software solutions that interface with Commercial Off‑the‑Shelf (COTS) products or custom‑designed hardware specifically developed for weapon systems.
• Documentation and Reporting
  :
  Author, maintain, and review comprehensive software documentation and technical reports to support long‑term system sustainability.
• Design Review Leadership
  :
  Lead and actively participate in tester design reviews, influencing technical direction and design decisions.
• Technical Drawing Development
  :
  Contribute to the development, review, and maintenance of tester drawing sets to ensure accuracy and compliance.
• Presentation Skills
  :
  Present software architecture, testing strategies, and design concepts to multidisciplinary engineering teams, fostering understanding and collaboration.
• Team Collaboration
  :
  Collaborate closely with team leadership, systems…