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Lead, Mechanical Engineering (Reactor Internals)

X-Energy, LLC
MD - Gaither Rd, MD Full Time
POSTED ON 11/26/2025
AVAILABLE BEFORE 12/26/2025
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 position provides management support and technical leadership to the group performing a subdiscipline of mechanical engineering across all projects and programs. This includes directing the work of individual contributors on the team, at the discretion of projects which they are supporting, providing organizational support for the project team, and assisting with the design, analysis and drafting of systems, structures, and components for various advanced reactor plants. Job Profile Tasks/Responsibilities Support the execution of the mechanical design, analysis, or evaluation of assigned projects using sound engineering principles and adhering to business standards, practices, procedures, and product / program / project requirements. This role may include specialization in one or more of the following areas: Structural Design- Lead team responsible for performing structural analysis to inform the design, manufacturing, construction and licensing strategy of various advanced reactor plants. Thermosystems- Lead team responsible for performing thermodynamic system analysis to inform the design, manufacturing, construction and licensing strategy of various advanced reactor plants. Thermal Hydraulics- Lead team responsible for performing computational fluid dynamic analysis to inform the design, manufacturing, construction and licensing strategy of various advanced reactor plants. Mechanical Design- Lead team responsible for performing the mechanical design of various advanced reactor plants to inform the design, manufacturing, construction and licensing strategy. Provides support for the management of the utilization of engineering resources across multiple projects and ensures qualified engineers are performing assigned work. Lead design cycle sprints and provide direction to ensure the convergence of efforts of engineering team members, partners, and suppliers to ensure the successful delivery of high-quality engineering work products are on schedule and within budget as defined by the Project leadership. May manage mechanical engineering staff by ensuring they are meeting expectations and promoting their professional development. Influences and supports the development of strategy, methodology and technical tools for the area of responsibility. Interprets internal business challenges and recommends best practices to improve products, processes, tools, or services. Uses judgement to support with making decisions and handling complex tasks or problems in areas of operations, product management, technology, or engineering. 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. Work within a multidisciplinary engineering team to create the next generation nuclear power plants. Perform work in accordance with design control procedures, ensuring thorough documentation of work, facilitation of internal and external design reviews, and control of product design configuration 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 discipline from an accredited university or college. Typically, seven years of engineering experience. Graduate degrees typically count as two plus years of experience. Experience and/or knowledge in a minimum of one of the following areas: Mechanical Design Designing and developing mechanical or fluid systems, assemblies, or components. Hardware ownership including manufacturing and testing oversight. Use of Computer-Aided Design (CAD) and product lifecycle management (PLM) software. E.g. UG/NX, SolidWorks, Pro-Engineer, Teamcenter, Windchill, or similar. OR Structural Analysis Analytical experience with structural analysis hand calculations and structural FEA software programs (e.g., ANSYS, ABAQUS, NASTRAN, FEMAP, CAESAR, ROHR, LS-DYNA, PIPESTRESS). Location: 530 Gaither Road, Rockville, MD Work Site Expectations: At least 4 days per week in office Travel Expectations: 20% Hours: Standard office schedule are 8:00am-5:00pm ET Mon-Fri 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 job postings reflect base salary only and do not include benefits or other incentives. A reasonable estimate for this position at the level of experience required is: $146,000- $184,690 Position Job Classification Full time - Exempt Benefits X Energy, LLC offers a robust benefits package that includes a 401K plan with an employer match, Medical/Dental /Vision Insurance, Life and Disability Insurance, Paid Time Off, and a Tuition Reimbursement/Professional Development policy that supports the continuing education of our employees. An Equal Opportunity Employer.  All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability. X Energy, LLC participates in E-Verify. Please visit the links below for more information about E-Verify and the protection of your Right to Work. Right To Work Link: If you have the right to work, don't let anyone take it away (e-verify.gov) E-Verify Participation Link: E-Verify Participation Poster English and Spanish X-energy is delivering the next generation of carbon-free energy by reinventing nuclear power. We believe in leaving a cleaner planet for our children and grandchildren, while continuing to provide sufficient and affordable power to sustain growing populations around the world. That is why we have reinvented nuclear power, with a unique combination of proven technologies and new innovations, to meet our current and future needs. Watch our Anthem here An Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability. Equal Employment Opportunity Posters X-energy does not discriminate in employment against qualified individuals on the basis of a disability, and understands its obligation to make reasonable accommodation for individuals with physical or mental impairments that qualify as a disability under the ADA and ADAAA, unless the accommodation would impose an undue hardship on the company. It is an applicant’s or employee’s responsibility to participate in this interactive process by seeking an accommodation, assisting X-energy in reviewing accommodation alternatives and providing medical certification of the need for an accommodation. Any applicant or employee who wishes to seek an accommodation under this policy should contact the Human Resources Department via email at hr@x-energy.com. Whether a requested accommodation would create an undue hardship will be determined based on the facts of each particular case.

Salary : $146,000 - $184,690

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Job openings at X-Energy, LLC

X-Energy, LLC
Hired Organization Address Rockville, MD Full Time
X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualificati...
X-Energy, LLC
Hired Organization Address Rockville, MD Full Time
X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualificati...
X-Energy, LLC
Hired Organization Address Rockville, MD Full Time
X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualificati...
X-Energy, LLC
Hired Organization Address Rockville, MD Full Time
*X-energy LLC conducts a thorough recruiting process and will never issue offers without interview to discuss qualificat...

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