Cleared Senior/Principal Lead Software Developer - Special Programs, NM/CA, Onsite

About the role

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://www.sandia.gov These benefits vary by job classification. What Your Job Will Be Like: Are you passionate about solving complex problems and applying your expertise to develop innovative solutions? Join our dynamic team and help solve critical challenges to enhance our nation's security! We are seeking an experienced Software Engineer (job title: R&D S&E Computer Science) to design and implement cutting-edge solutions for high-consequence national security challenges. In this role, you will collaborate with U.S. government customers to develop impactful capabilities that directly support warfighters, strengthen national security, and deliver measurable results for critical missions. Your contributions will foster innovation, leverage teamwork, and cultivate creativity while addressing key mission needs. On any given day, you may be called on to: Lead and collaborate with technical design teams and subject matter experts to create innovative solutions that meet mission requirements and address end-user needs. Utilize your skillset in software system architecture, software system implementation, technical documentation, reliability and performance assessment, and/or systematic technology insertion to enhance mission capabilities utilizing code bases ranging from 0.5 to 1.0+ million lines of code. Collaborate with Software Engineers, System Engineers, Information Technology staff, management, and customers to implement solutions that address requirements. Architect software systems, develop code, write unit tests, and create software tools to support the mission. Develop and execute test plans/procedures, create reports, and write software documentation. Perform system integration and unit testing. Apply system design principles to architect scalable, reliable, and secure solutions for critical missions. Incorporate software design methodologies to proactively address computer security considerations throughout the software development lifecycle. Develop and refine system CONOPS (Concept of Operations) to ensure technical solutions address operational needs. Due to the nature of the work, the selected applicant must be able to work onsite full-time at either the Livermore, CA site or the Albuquerque, NM site. Applicants on this requisition may be interviewed by multiple organizations at Sandia National Laboratories. The position requires an ability to travel up to 25% to support the mission. Salary Range: $139,900 - $280,600 *Salary range is estimated, and actual salary will be determined after consideration of the selected candidate's experience and qualifications, and application of any approved geographic salary differential. Qualifications We Require: A Bachelor's degree in a relevant discipline and five (5) years of directly relevant experience, or an equivalent combination of directly relevant education and engineering or scientific experience that demonstrates the knowledge, skills, and ability to perform independent research and development. Active DOE Q-level (or equivalent) clearance and the ability to obtain SCI-level security clearance. Qualifications We Desire: The ideal R&D S&E Computer Science candidate for Sandia National Laboratories will in addition possess the following: Graduate degree in Computer Science or a highly related field where an independent research project was a graduation requirement (e.g., independent project, thesis, or dissertation). Demonstrated software development skills and familiarity with modern software development practices and tools (e.g., Agile). Strong verbal and written communication skills, ability to work effectively in multidisciplinary teams, and a passion to improve and expand technical skills. Also, for this posting we are seeking individuals with the following experience: 8+ years of experience in software engineering for code bases with 0.5 to 1.0+ million lines of code and the ability to quickly understand and contribute t