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X-energy

CFD Engineer III-V (Fluid Vibrations Analysis)

Rockville, MD

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hirly's read of this role

Seniority
Senior
Country
US
Work mode
On-site / unstated
First seen by hirly
27 Sept 2026

Derived automatically from the posting. Upload your resume above to see how the role scores against it.

the posting

X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualifications and responsibilities. All applications will be submitted via our company career page, www.x-energy.com/careers/ . We will never ask you to provide payment information as part of the recruiting process. If anyone claiming to represent X-energy directs you in a manner otherwise, please contact us at www.x-energy.com/contact-us .

Job Description

This role is responsible for the engineering design and development of mechanical systems, structures, and components. This includes concept development, evaluation of concepts, analysis of systems, structures, and components for their ability to perform their intended function, and ensuring they meet all technical specifications and requirements. The role will ensure the development of the systems and components through production including any necessary prototyping, testing, and commissioning.

Job Profile Tasks/Responsibilities

  • Develop mechanical/physical concepts, design and support development of processes to create or identify structures, systems, and components (SSCs) for use in nuclear products or facilities with a focus on nuclear safety.
  • Identify, collect, and document applicable requirements, interfaces, design basis and criteria by coordinating with key stakeholders/systems engineers and support identifying applicable industry codes and standards and the direction of project leads and systems engineers.
  • Planning and performing the analysis required to assess aspects of the SSCs to ensure they can perform their intended functions and meet technical specifications and design requirements.
  • Perform computations utilizing hand calculations and analytical tools for structural, thermal, hydraulic, and other scoping calculations as required at the direction of project leads and systems engineers to ensure SSCs can meet technical requirements.
  • Responsible for development, testing and verification of CFD models to support design and analysis which will form part of the reactor licensing basis (steady state and transient conditions, design basis events, anomalies, etc.)
  • Responsible for providing heat transfer, fluid mechanics, and particulate mechanics analysis to support the design of various X-energy developed reactors and supporting subsystems.
  • Support the assessment of SSCs for manufacturability as well as assembly and integration considerations at the direction of project leads.
  • Write and develop design documentation including design basis documents, technical reports, calculations, and drawings in accordance with applicable procedures.
  • Develop Verification and Validation (V&V) plans for analytical tools and support qualification of toolset.
  • Perform work in accordance with X-energy quality procedures for design and configuration management to ensure project quality requirements are met.
  • Provide independent reviews and acceptance reviews of engineering deliverables and data.
  • Maintain professional demeanor and behavior at all times in all forms of communication.
  • Perform other duties as assigned by manager.

Job Profile Minimum Qualifications

  • Bachelor’s degree in mechanical engineering, or related engineering discipline (e.g., nuclear aerospace, chemical, etc.) from an accredited institution required.
  • Proficiency with engineering hand calculations is required.
  • Experience and/or knowledge in a minimum of one of the following areas
  • Use of Computational Fluid Dynamics (CFD) analysis codes (e.g., STAR-CCM+, Fluent, or similar).

Preferred Skills

  • Experience with fluid vibrations or acoustic analysis (Wave6 or VAone)
  • Experience with Star-CCM+

Job Level Qualifications

Level III

Level Tasks/Responsibilities

Execute the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, with minimal supervision.

Provide ownership, responsibility, and accountability over technical scope involving the coordination of multiple individual contributors working in a specific area.

Level Minimum Qualifications

Typically, five years of experience in an engineering role required.

A master’s degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience.

A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience.

Level IV

Level Tasks/Responsibilities

Lead the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, without close supervision and some latitude for independent judgement.

Provide feedback and guidance to more junior team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document.

Lead small groups of engineers to solve complex technical problems and deliver high quality engineering work products on time and within budget.

Level Minimum Qualifications

Typically, ten years of experience in an engineering role required.

A master’s degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience.

A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience.

Level V

Level Tasks/Responsibilities

Lead the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, without close supervision and extensive latitude for independent judgement.

Teach and mentor more junior team members.

Stay abreast of industry and academic trends, breakthroughs, and best practices.

Level Minimum Qualifications

Typically, fifteen years of experience in an engineering role required.

A master’s degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience.

A Ph.D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience

.Previous experience at X-energy exceeding performance standards may be in lieu of years of experience.

  • Location: 9801 Washingtonian Blvd, Gaithersburg, MD
  • Work Site Expectations: 5 days in office
  • Travel Expectations: Up to 40%
  • Hours: Standard office hours are 8:00am - 5:00pm ET, Monday – Friday

Compensation

As required by Maryland and other applicable state law, X Energy, LLC (X-energy) lists the expected compensation range for a publicly advertised job opportunity based upon the job requirements (e.g. education/training, experience, skill sets, etc.). Individual candidates who meet the job requirements for the posted position will be offered a salary within this range based on their respective levels of education/training, experience, and other qualifications unique to them. Salary ranges may vary based on the specific office location and region referenced in the posting to take into consideration differences in cost of living and may not be reflective of all regions. Please note that compensation ranges listed for US

Original posting on X-energy's site ↗

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