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Engineer II-IV, Reactor Physics

Listing for: X-energy
Full Time position Listed on 2026-11-09
Job specializations:
  • Engineering
    Mechanical Engineer, Systems Engineer, Engineering Design & Technologists, Electrical Engineering
Salary/Wage Range or Industry Benchmark: 108000 - 185000 USD Yearly USD 108000.00 185000.00 YEAR

Job Description & How to Apply Below

## Engineer II-IV, Reactor Physics Apply:
Rockville, MD:
Full time:
Posted Yesterday:
R101415
* 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,* ***. 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* ***.
*** Job Description
** This role is responsible for performing engineering tasks associated with designing, developing, and conducting analyses of a nuclear reactor or nuclear facility.
** Job Profile Tasks/Responsibilities
*** Perform design, analysis, and evaluation in assigned projects using sound engineering principles and adhering to business standards, practices, procedures, and product / program requirements.
* Support team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, under guided supervision.
* Coordinate with engineering team members, partners, and suppliers to facilitate the convergence of efforts, allow design closure, provide design assurance, and deliver high quality engineering work products.
* Collaborate in planning, scheduling, and organizing detailed phases of engineering work.
* Collaborate in the technical oversight and direction of internal or external design teams.
* Facilitate and assist in the assessment of customer needs and capture requirements and functions related to nuclear engineering.
* Execute nuclear engineering assignments with clear and specified objectives; utilize conventional specifications and/or Interface Control Documents and plans.
* Recommend system design alterations and enhancements to improve quality of products and/or procedures from an assembly, transportation, construction, commissioning, operations, maintenance, and/or decommissioning perspective.
* Lead reviews and presentations for internal company design reviews and customer design reviews regarding nuclear design.
* Organize engineering efforts in assigned areas between specialty and other engineering groups or disciplines, with the client, suppliers, contractors, or other groups as required.
* Maintain a 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 nuclear engineering or related degree from an accredited institution.
* Typically, three years of experience in an engineering role for a level II.
* Typically, five years of experience in an engineering role for a level III.
* Typically, ten years of experience in an engineering role for a level IV.* + 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.
* Possess technical experience and proven expertise in one or more of the following areas:  + Reactor core design and analysis.  + Radiation shielding design and analysis.  + Nuclear fuel analysis and qualification.  + Criticality safety.  + Reactor multiphysics analysis, especially pertaining to transient…
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