Role
X-energy is hiring a CFD/Thermal Hydraulics Engineer at level III–IV (requisition R101290) for heat transfer, fluid flow, and particulate modeling in support of advanced reactor development. The job header lists Rockville, Maryland; the posting body specifies physical work at 9801 Washingtonian Blvd, Gaithersburg, Maryland.
Responsibilities include steady-state and transient CFD modeling, licensing-basis analysis support, model verification and validation, requirements and interface management, design documentation, and manufacturing review of modeled components.
Qualifications require a B.S. in mechanical, nuclear, aerospace, or chemical engineering with STAR-CCM+ or Fluent proficiency; level III requires 5 years and level IV 10 years of relevant experience, with a master's counting as 2 years and a PhD as 3 years toward the requirement. Stated compensation is Level III $122,500–$138,750 and Level IV $132,000–$155,000.
Snapshot
| Employer | X-energy |
| Workplace | Header lists Rockville, MD; body specifies 9801 Washingtonian Blvd, Gaithersburg, MD |
| Onsite | Onsite |
| Employment type | Full-time |
| Salary | Level III $122,500–$138,750; Level IV $132,000–$155,000 |
| Date posted | 2026-09-24 |
| Expires | — |
| Verified | 2026-09-27 |
Sources & verification
The original publication date is exactly as posted on the employer ATS — no substitutions. The links below are the same ATS pages we used to verify this listing; the dates come from when we last checked them.
- Last checked