{"id":3193561,"url":"https://alion.io/job/amentum-sls-orion-trajectory-analyst-entry-level-es2","title":"SLS Orion Trajectory Analyst, Entry Level (ES2)","company":{"id":14861,"name":"Amentum","domain":"amentum.com","url":"https://alion.io/company/amentum","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":81,"open_postings":108,"ghost_share":0,"stale_share":0.963,"repost_share":0,"time_to_fill_p50_days":16,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Analytics","role_family":"Analytics","seniority":"junior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Huntsville, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":61000,"max_usd":114000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":1106},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Bash","optional":false},{"name":"C++","optional":false},{"name":"Fortran","optional":false},{"name":"Linux","optional":false},{"name":"MATLAB","optional":false},{"name":"Python","optional":false},{"name":"Verification & Validation","optional":false}],"status":"live","first_seen_at":"2026-07-16T00:00:00Z","employer_posted_date":"2026-07-16","last_verified_at":"2026-10-28T12:41:52Z","board_verified":true,"closed_at":null,"days_open":104,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":104},"description":"Join Our Journey\nAt Amentum Space Exploration Division (ASED your growth is our priority! That’s why we offer an array of exciting opportunities for your career development. From the transformative Team Lead Academy to education reimbursement, personalized mentoring, and engaging company-sponsored networking events, you have the power to shape your professional journey in a way that aligns with your aspirations.\nFind Your Community\nAt the heart of our thriving business are the incredible people who make it all possible. We celebrate a vibrant array of cultures, backgrounds, and experiences. Here, we foster an environment where everyone-employees, clients, and partners alike-are treated with the dignity and respect they deserve.\nPrioritize Your Well-Being\nOur extensive benefits package is designed with your health in mind. Enjoy wellness programs, paid holidays, generous time off, employee perks, and so much more. We’re here to help you achieve a harmonious balance in your life-both at work and at home.\nTogether, We Soar\nOur dynamic team consists of 10 companies united in a single mission: to venture from Moon to Mars and beyond. Join us on this extraordinary adventure!\nThe Mission Analysis and Trajectory Design Engineer helps support the development, integration, and testing of flight mechanics simulations for NASA’s SLS/ARTEMIS program, NASA’s HLS program, and other smaller NASA projects. This position will require a well-rounded background of flight dynamics modelling skills, experience with computer programming, and the desire to perform high fidelity analyses to help optimize and integrate inputs for the flight dynamics of the Artemis mission.\nDescription\nThe Amentum Space Exploration Division (ASED) Guidance, Navigation, and Control (GN&C) team is a high performing group executing challenging tasks to design and integrate GN&C systems for NASA projects ranging from NASA’s Space Launch System(SLS) to NASA’s Human Lander System. We are searching for highly qualified candidates to support NASA’s Flight Dynamics Team in the Guidance, Navigation, & Mission Analysis branch at NASA’s Marshall Space Flight Center. This exciting work will serve as a critical step in sending humans back to the Moon, Mars and beyond!\nASED offers a partnership in which you can grow personally and professionally within a framework of strong leadership, competitive compensation, and rewarding career paths. Come join our team!\nJob Functions:\nAnalysis of launch vehicle and spacecraft, dynamics, equations of motion, and trajectories to assess performance of spacecraft trajectories, mission analysis, and related studies\nModeling ascent and in-space environments, errors, disturbances, GN&C algorithms, sensors, actuators, and mechanisms\nSimulate and analyze nominal, contingency, and failure scenarios during ascent and in-space flight\nDevelop algorithms and tools to analyze 3 DOF trajectories using Monte Carlo techniques\nPerform studies and insight analysis for NASA’s HLS program\nExecute/modify existing software/scripts in C, Python, C++\nQualifications\nA degree in Aerospace Engineering, Mechanical Engineering, Physics or related field from an ABET accredited institution is required. Typical experience requirements are the equivalent a Masters with at least 3 years of experience, or BS with at 0-5 years of experience. Must be a US Citizen and have a STAR ID.\nTo be successful in this position, the applicant must be detail oriented, work independently and collaboratively, possess strong communication and interpersonal skills, and will typically possess some of the following skills:\nDynamically model 3 and 6 DOF single body systems\nMatlab, Fortran, C++ programming experience\nFamiliarity with Linux, Bash, and the use of computational clusters/servers\nSupport the design, integration, and analysis of GN&C products.\nConfigure, conduct, and analyze 6-DOF Monte Carlo simulations.\nFamiliarity with convex optimization\nThe candidate is REQUIRED to have the following skills and experiences:\nTrajectory Design and/or mission analysis experience\nPython programming experience\nCopernicus experience\nSoftware & simulation integration OR Modeling & simulation experience\nDuties\nDay to day activities include:\nDynamic modeling of 3 and 6 DOF single body systems\nMission design and analysis\nTrajectory design analysis\nCreating, editing and debugging software written in C, Python, Matlab, Fortran, and C++.\nOptimization and improvement of analysis tools and GN&C models.\nWorking with GN&C leads and other engineering disciplines.\nSupporting the verification and validation of technical products.\nCreation and review of engineering and software documentation.\nPreparing and Presenting technical reports and briefings.\nEssential Functions\nWork Environment:\nOffice 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%).\nPhysical Requirements:\nRequires 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%).\nEquipment and Machines:\nRequires ability to operate a personal computer, a telephone, fax machine, copier, calculator, and other general office equipment (100%).\nAttendance:\nNormal 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.\nOther Essential Functions:\nThe 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.\nProof of U.S. Citizenship is required.\n#ESSCA #ASED #Amentum\nCompensation Details:\nES2The 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.\nBenefits Overview:\nOur health and welfare benefits are designed to support you and your priorities. Offerings include:\nHealth, dental, and vision insurance\n\nPaid time off and holidays\n\nRetirement benefits (including 401(k) matching)\n\nEducational reimbursement\n\nParental leave\n\nEmployee stock purchase plan\n\nTax-saving options\n\nDisability and life insurance\n\nPet insurance\n\nNote: 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.\nOriginal Posting:\n07/16/2026 - Until FilledAmentum 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.\nAmentum 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. 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