Junior System Engineer Jobs in Missouri (NOW HIRING)

• Support the Systems Engineering team in managing and executing systems engineering processes to ensure continuity across the SFRC.

• Assist in the management of LTRS requirements, including the use of requirements management tools.

• Support the development and management of architectural documents for the LTRS architecture baselines.

• Assist in performing architectural analysis at the system and subsystem levels, including assessing impacts to technical baselines.

• Support the Test & Evaluation (T&E) program by assisting in the planning, execution, and reporting of T&E activities for LTRS modifications and new systems.

• Assist in performing requirements analysis, decomposition, and allocation from the system level to the component level.

• Support the development of acquisition documentation (e.g., SOO, SOW, PWS) and assist in Request for Proposal (RFP) development.

• Provide support for launch operations as required.

• Strong analytical and problem-solving skills.

• Excellent written and verbal communication skills.

• Aptitude to learn new concepts and technologies rapidly.

• Strong interpersonal skills and ability to work effectively in a team environment.

• Proficiency with Windows-based computer systems and the Microsoft Office suite.

• Dedication to delivering quality work and achieving outstanding customer results.

• Excellent time management and organizational skills.

• A bachelor’s degree in a STEM (Science, Technology, Engineering, or Math) or similar field.

• 0-2 years of relevant experience in systems engineering or a related technical field.

• Flexibility to work occasional non-standard hours or weekends to support mission requirements.

• Though this position does not require frequent travel, the ability to travel is required.

• Must be able to obtain and maintain a DoD Secret Security Clearance (requires U.S. citizenship).

• Valid U.S. Driver’s License.

• Experience with requirements management tools such as DOORS, Jama, or DOORS Next Generation.

• Experience with Model-Based Systems Engineering (MBSE) tools such as Cameo.

• Experience with work management tools such as Jira.

• Familiarity with any aspect of the systems engineering lifecycle (Requirements, Architecture, Test & Evaluation).

• Previous Range operations support experience.

The annual starting salary for this position is between $75,000 to $85,000 annually. Factors which may affect starting pay within this range include geography/market, skills, education, experience, and other qualifications of the successful candidate.

90,000

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.

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.

08/18/2026 - Until Filled

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.

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.