SECTION I · THE BRIEF
Brief #73003Updated 16 SEP 2026ROCKVILLE, MDWorkdayPYTHON
Employbl Company Profile

Thermal Analysis Manager

X-Energy LLC operates as a nuclear energy solution company. The Company focuses on energy, environmental, national, economic, industrial, and infrastructure security. X-Energy serves customers in the United States.

Location
Rockville, MD
Company size
200–500
Posted
Yesterday
Comp band
$140K–$180K
Section II · Full ProfileFree with an account
  • 01Equity package & total comp detailLocked
  • 02Seniority & experience requirementsLocked
  • 03Interview process & rubricLocked
  • 04Hiring manager & team contextLocked
  • 05Growth trajectory in this roleLocked
  • 06Offer & decision timelineLocked

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Thermal Analysis Manager

X-energy· Rockville, MDView company profile


Job title
Thermal Analysis Manager
Job location
Rockville, MD
Job description

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 is responsible for managing the group of engineers responsible for 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 Responsibilities

  • Manages the execution of the mechanical design, analysis, and evaluation of assigned projects using sound engineering principles and adhering to business standards, practices, procedures, and product / program requirements.
  • Manages the utilization of engineering resources across multiple projects and ensures qualified engineers are performing assigned work.

  • Adjudicates technical differences within their area of responsibility to determine best option, while fostering a healthy engineering dialogue.

  • 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.

  • Manages staff by ensuring they are meeting expectations and promoting their professional development.

  • Influences the development of strategy, methodology and technical tools for the area of responsibility, including control of resources, policy formulation, and ways in which technical work is executed.

  • Interprets simple internal and external business challenges and recommends best practices to improve products, processes, tools, or services.

  • Uses high level of judgement to make decisions and handle complex tasks or problems in areas of operations, product management, manufacturing, technology, or engineering.

  • Act in advisory capacity to define scope and level of effort estimates for areas where their resources would be supporting.

  • 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 Qualifications

  • Bachelor’s degree in mechanical engineering or related discipline from an accredited university or college.
  • Typically, ten years of engineering experience. Graduate degrees typically count as two plus years of experience.
  • Use of 1D flow-solvers performing heat/energy and mass balance (e.g., RELAP, Flownex, NPSS, SINDA/FLUINT, ASPEN Plus, Flomaster, or similar).

Preferred Skills

  • 5+ years of dedicated thermal-hydraulic or thermodynamic systems analysis experience within the nuclear industry.
  • Supervisory experience: perform yearly performance reviews, guide career development, and provide coaching and conflict resolution.
  • Execute project schedule – ensure team delivers technical tasks on-time while maintaining quality.
  • Plant-Level Steady-state Analysis: oversee/perform thermodynamic assessment of primary and secondary systems to define cycle efficiency and mass and energy balance. 
  • Plant-level Transient Analysis: Oversee/ Evaluate system behavior during normal operational cycles and off-normal accident scenarios.
  • Deep understanding of single and two-phase flow fluid mechanics, heat transfer phenomena, and plant dynamics.

Location:  9801 Washingtonian Blvd, Gaithersburg, MD 
Work Site Expectations:  4 days in office

Travel Expectations: up to 10% as needed

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.

 

Offers within the posted salary range are commensurate with the individual’s qualifications for the position, along with a view on internal equity, market data, and room for growth. The salary range for this position is:

$140,000 - $180,000

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  

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X-energy headquarters

Rockville, MD

Company size

200500 employees

Founded

2009

View company profile ↗

Funding rounds