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Rarefied Gas Dynamics Modeling SME

Houston, TX; Houston; Texas; TX; Houston, Texas; United States
Full Time On-site

Summary

Job Description

Are you passionate about human space exploration, understanding the origins of the universe, and working with a passionate and diverse team to make a difference? If you are, we need you!

We need your talent, teamwork, and energy to help us achieve great things that inspire people all over the globe. We need you to bring creative ideas and diverse backgrounds to help us envision, shape, and deliver systems that will enable the exploration of space while benefiting people here on Earth. We are excited about what we do, and we need you on our team as we take on exciting challenges for NASA’s pursuits in deep space exploration. As NASA’s largest engineering solutions provider working together with NASA at centers across the United States.

We have an exciting opportunity for a part-time Rarefied Gas Dynamics Modeling SME to join the team!

The Rarefied Gas Dynamics Modeling SME will:

  • Enhance and utilize NASA's Direct Simulation Monte Carlo (DSMC) Analysis Code (DAC)
  • Utilize experience with CFD Solutions to inform RGD simulations
  • Utilize expertise to guide junior engineers in rarefied flow field physics
  • Guide junior engineers in the use of DAC and similar simulation tools.
  • Perform deep dive analyses as needed
  • Perform other duties as required.

Requisition Qualifications:

  • Typically, educational requirements are the equivalent of a BS with at least 15 years of experience.
  • Experience using CFD solutions to inform RGD simulations
  • Expertise with upper atmosphere aerodynamic and aerothermodynamic modeling approaches and sensitivities
  • Expertise with rarefied flow field physics
  • Excellent communication skills and the ability to work in a team environment consisting of NASA civil servants and various contractor employees.

Requisition Preferences:

  • MS or Ph.D. in Mechanical or Aerospace engineering
  • Expertise with high fidelity modeling approaches and codes for rarefied flow fields, like DSMC Analysis Code (DAC)
  • Expertise with vacuum plume testing and modeling validation
  • Expertise for visiting vehicle docking and berthing plume flow fields and modeling
  • Expertise with engineering approaches and tools to model rarefied flow fields
  • Experience mentoring junior engineers

Why Join Our Team?

In addition to exciting career opportunities, we also have:

  • 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 www.wehavespaceforyou.com

  • Proof of U.S. Citizenship or US Permanent Residency may be a requirement for this position.
  • Must be able to complete 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

About Amentum

Amentum

Amentum is one of the largest government services and engineering companies supporting the U.S. military, intelligence community, and federal agencies. Headquartered in Virginia with more than 50,000 employees worldwide, Amentum delivers mission-critical support across defense, cybersecurity, engineering, logistics, intelligence, aviation, nuclear, and space operations. The company plays a major role in helping government agencies solve complex national security and infrastructure challenges.

For job seekers, Amentum offers a wide variety of career opportunities across engineering, cybersecurity, intelligence, logistics, IT, aviation maintenance, program management, and cleared government support roles. The company is especially attractive to veterans, transitioning military personnel, and security-cleared professionals looking to continue supporting national security missions while building long-term career stability. Amentum also has a strong reputation for career mobility, education support, and mission-focused work across hundreds of federal programs.

Unlike many companies focused on a single niche, Amentum supports a broad range of high-impact missions—from military readiness and intelligence operations to NASA programs, cyber modernization, and critical infrastructure support. Employees often work on programs that directly support the Department of Defense, intelligence agencies, and federal civilian missions, creating opportunities to build diverse experience while contributing to meaningful national security outcomes.

As government investment continues to grow in cyber, space, engineering, and mission modernization, Amentum remains one of the strongest employers in the government contracting sector. For professionals seeking a stable, mission-driven career with opportunities for advancement, technical growth, and meaningful impact, Amentum continues to stand out as a top employer in defense and federal services.

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