Space Nuclear Propulsion Engine Systems Analyst

About the role

Create Your Career: Grow With Us. Your growth matters to us—that’s why we offer a variety of ways for you to develop your career. With professional and leadership development opportunities like Team Lead Academy, education reimbursement, mentoring, and company sponsored networking events, you can take control of your own career path on your own terms with a company that believes in you.

Responsibilities

• Expertise in Nuclear Core Multiphysics (MP) Modeling: Experience with the physics involved in nuclear core dynamics, including heat transfer, fluid mechanics, structures, and nuclear engineering. Proficiency in at least one of these areas, with a strong focus on nuclear engineering, is essential.
• Nuclear Reactor Operations: Familiarity with nuclear reactor startup, shutdown, cooldown, testing, and controls is highly desired. Experience with simulating these operational phases is a plus.
• Nuclear Reactor Core Materials: Understanding of the materials and nuclear properties of nuclear reactor cores, particularly those used in nuclear thermal propulsion systems.
• Simulation Software Proficiency: Experience with simulation tools such as MCNP and OpenMC is highly desired. Familiarity with MOOSE is also valuable.
• Nuclear Fuel Performance: Solid understanding of nuclear fuel performance, including the ability to model the nuclear, chemical, and mechanical effects of fuel under varying operational conditions.
• Create/utilize stability analysis tools to assess engine stability from ROCETS model results.
• Cross-Disciplinary Collaboration: Proven ability to interface successfully across multiple organizations and disciplines, ideally in a leadership or collaborative capacity.
• Software Integration: Strong ability to efficiently integrate disparate software systems and work comfortably in a networked environment, particularly on Linux systems and high-performance computing (HPC) platforms.
• Modeling & Simulation Software Development: Experience with M&S software development, including parallel processing and efficient solution algorithms, is highly desirable.
• Career Development: Coordinate, develop, and present technical materials related to engine system performance and testing in support of design milestone reviews and anomaly investigations.
• Document and maintain test and data analysis processes in written work instructions.
• Participate in relevant trade teams.
• Identify and pursue resolution of issues.
• Identify and document customer objectives and product requirements.

Requirements

• BS plus 20 years of experience, or MS plus 18 years of experience in Nuclear, Aerospace, or related engineering field from an ABET-accredited university.
• Proficiency with Computational Model Validation.
• Experience with radiation shielding/detection/source handling.
• Proficiency with FORTRAN 90 is desirable.
• Excellent presentation skills.
• Excellent organizational skills and time management.
• Able to work in a team environment.
• Must be able to provide own transportation.

Qualifications

• Proof of U.S. Citizenship is required.

Benefits

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.

Pay

SME2

Schedule

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.

Essential Functions

• Work independently with minimal supervision, and to make rational decisions, and to exercise good judgment is essential.
• Grooming and dress must be appropriate for the position and must not impose a safety risk/hazard to the employee or others.

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

• 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.

Original Posting

03/26/2026 - Until Filled

Company Information

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.

EEO Statement

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.