We are searching for a Senior Software Engineer to join the Space Launch System (SLS) Flight Software (FSW) Design Team, playing a pivotal role in the continued success of the Artemis mission. In this position, you will assume full ownership of mission-critical, human-rated flight software components, contributing directly to the design and development of the SLS vehicle that will propel humans back to the Moon. Required Qualifications: A degree in computer engineering, computer science, electrical engineering, or a related discipline is necessary. While a degree from an ABET-accredited university is preferred, candidates should meet one of the following educational and experience benchmarks: Ph.D. with a minimum of 9 years of experience, Master’s with at least 13 years, or Bachelor’s with at least 15 years. Must be a US Citizen and have a STAR ID.   Essential Skills and Experience: - Demonstrated proficiency in designing, developing, and testing real-time embedded spaceflight or complex mission-critical system software, adhering to both organizational and project coding standards, as well as NASA standards and practices. - Strong background in Object-Oriented Design and Implementation, with advanced expertise in C/C++ programming. - Experience with a variety of scripting languages (Python, JavaScript, bash/shell, etc.) and development environments (Eclipse, Visual Studio, etc.). - Familiarity with real-time operating systems such as VxWorks and common tools including the Atlassian suite (Jira, Confluence) and Git/GitHub. - Knowledge of continuous integration practices and Agile development processes. - Skilled in SW/HW integration, debugging, troubleshooting, and handling various communication/protocol interfaces (ethernet, RS422, 1553, etc.). - Competence in Unified Modeling Language (UML) and experience collaborating within a software development team in an Agile environment. - Ability to work independently and effectively as part of a diverse team. - Excellent communication skills, enabling professional interactions with customers, stakeholders, and cross-organizational colleagues.   Desirable Experience: - Hands-on involvement in integrating, troubleshooting, executing, and testing spaceflight software in both hardware-in-the-loop and simulated environments. - Professional Agile/Scrum training. - Knowledge of fault-tolerant avionics architectures. Essential Functions Work Environment:  Office environment. Requires ability to provide clear, concise, accurate and timely communication, both verbally and in writing (100%). Requires ability to interact professionally with co-workers, management, and client (100%). Requires travel in the domestic USA (5%).  Requires ability to work at a computer for long periods of time (100%). Physical Requirements: Requires sitting for extended periods of time in meetings with peers, management, and with our client at NASA facilities to discuss technical issues (10%). Also, requires sitting for extended periods of time at a desk to write reports and perform engineering tasks (80%). Requires ability to use stairs or elevators for access between floors and multiple buildings at NASA and our facilities (10%).   Equipment and Machines:  Requires ability to operate a personal computer, a telephone, fax machine, copier, calculator, and other general office equipment (100%). Attendance:  Normal workday 7:30-4:30, Monday thru Friday.  Minimal overtime may be required (10%) to meet schedule milestones and to support technical demands of the job. Regular attendance is a necessity, and adequate arrangements for delegating duties during absences are required.  Other Essential Functions: The ability to work independently with minimal supervision, and to make rational decisions, and to exercise good judgment is essential (100%). Grooming and dress must be appropriate for the position and must not impose a safety risk/hazard to the employee or others. Proof of U.S. Citizenship is required.  #ESSCA #ASED #Amentum         Compensation Details: ES5         The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.   Benefits Overview: Our health and welfare benefits are designed to support you and your priorities. Offerings include: • Health, dental, and vision insurance • Paid time off and holidays • Retirement benefits (including 401(k) matching) • Educational reimbursement • Parental leave • Employee stock purchase plan • Tax-saving options • Disability and life insurance • Pet insurance   Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.         Original Posting: 08/20/2026 - 09/24/2026 Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.