Amentum

Chemical Engineer - Modeling & Simulation

Amentum$95K — $115K *
Aerospace & Defense
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Engineering required, preferably Chemical Engineering.
  • 2-5 years of relevant experience required.
  • Experience in developing air and water purification simulation models essential.
  • Strong technical writing skills for data analysis and documentation.
  • Excellent communication and presentation skills in a team setting.

Responsibilities

  • Support environmental control and life support systems analysis for advanced projects.
  • Simulate life support systems for NASA's future vehicles and habitats.
  • Correlate water and air process simulation models with test results.
  • Model physical and chemical processes related to life support functions.
  • Evaluate and refine life support equipment requirements for future missions.

Benefits

  • Health, dental, and vision insurance available.
  • Paid time off and holidays provided.
  • 401(k) matching retirement benefits offered.
  • Educational reimbursement program available.
  • Parental leave policy in place.
  • Employee stock purchase plan offered.
  • Tax-saving options available.
  • Disability and life insurance included.
  • Pet insurance options offered.
Full Job Description

We have an exciting opportunity for a Chemical Engineer - Modeling & Simulation to join the team with Intuitive Machines, a teammate company!

The Chemical Engineer - Modeling & Simulation will:

  • Support the advanced environmental control and life support systems analysis group and the Portable Life Support System (PLSS) group.
  • Simulate and evaluate performance of life support systems for future NASA vehicles and habitats including the Orion spacecraft and vehicles capable of lunar or Mars missions.
  • Correlate water and air process simulation models to test results.
  • Model physical and chemical processes, and size equipment performing life support functions for long duration space flights.
  • Evaluate and refine requirements for life support equipment that will support future missions.
  • Perform other tasks assigned.

Requisition Qualifications

​This position has been posted at multiple levels. Depending on the candidate's experience, requirements, and business needs, we reserve the right to consider candidates at any level for which this position has been advertised.

  • Typically requires a bachelor's degree in Engineering and a minimum of 2- 5 years of experience in the field or in a related area.
  • Requires a bachelor's degree in engineering in the field or in a related area.
  • Capable of developing simulation models of air and water purification processes at varying levels of fidelity ranging from detailed, first-principle models to more descriptive lumped-parameter models.
  • Excellent technical writing skills and the ability to use data to draw conclusions and support the conclusions when challenged.
  • Excellent presentation skills.
  • Excellent communication skills in a team environment.

Preferences

  • Aspen software experience.
  • Experience with dynamic chemical process simulation.
  • Programming knowledge in one or more of the following: MATLAB, Simulink, Python, FORTRAN, C, Visual Basic.
  • Experience with chemical processes associated with NASA life support systems.
  • Masters or Ph.D. in Chemical Engineering

Why Join Our Team?

In addition to exciting career opportunities, we also ave:

  • Excellent personal and professional career growth
  • 9/80 work schedule (every other Friday off), when applicable
  • Onsite cafeteria (breakfast & lunch)
  • Much, much more!

For more information on our partnership with NASA at Johnson Space Center (JSC), please visit

  • Proof of U.S. Citizenship or US Permanent Residency may be a requirement for this position.
  • Must be able tocomplete a U.S. government background investigation.
  • Management has the prerogative to select at any level for which the position is advertised.

Essential Functions

Work Environment

Generally, an office environment, but can involve inside or outside work depending on task.

Physical Requirements

Work may involve sitting or standing for extended periods (90% of time). May require lifting and carrying up to 25 lbs. (5% of time).

Equipment and Machines

Standard office equipment (PC, telephone, printer, etc.).

Attendance

Regular attendance in accordance with established work schedule is critical. Ability to work outside normal schedule and adjust schedule to meet peak periods and surge requirements.

Other Essential Functions

Professional behavior that enhances productivity and promotes teamwork and cooperation. Grooming and dress must be appropriate for the position and must not impose a safety risk/hazard to the employee or others.

#JETS #JETSII

Compensation Details:

EN2-EN4

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:

09/18/2026 - 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.

About Amentum

Amentum is a leading provider of engineering and technical services to the U.S. government and commercial customers worldwide. The company offers a wide range of services, including environmental remediation, facilities management, and logistics and supply chain management, among others. Amentum has a global presence, with operations in over 20 countries, and serves a diverse range of customers, including the Department of Defense, the Department of Energy, and the Department of State. The company is committed to providing high-quality services and has a strong reputation for technical expertise, innovation, and customer satisfaction.
Learn more about Amentum
Size
20,000 employees
Industry
Net Income
$200 million
Founded
2014
Revenue
$5 billion

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