X-energy · 3 months ago
Principal Engineer/ Mechanical Engineering Manager (Heat Exchanger Design)
Rockville, MD
Full-time
Onsite
Senior Level, Lead/Staff
$152K/yr - $228K/yr
10+ years expX-energy, LLC is seeking an accomplished Principal Engineer/Mechanical Engineering Manager (Heat Exchanger Design) to lead their advanced Mechanical Design team in developing Steam Generators and Heat Exchangers for advanced nuclear reactor applications. This leadership position involves driving the strategic direction and technical excellence of mechanical design operations, mentoring engineers, and managing complex design projects.
Clean EnergyCleanTechEnergyNuclearRenewable Energy
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
Lead team responsible for performing the mechanical design of various advanced reactor plants to inform the design, manufacturing, construction and licensing strategy
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
Qualification
Required
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
Experience and/or knowledge in a minimum of one of the following areas: 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
Preferred
8+ years of mechanical engineering experience, with at least 4 years in heat exchanger or steam generator design (preferred)
Proven track record of taking a product from conceptual design through manufacturing, including prototyping, testing, and production
Experience with tube bundle design, including thermal-hydraulic analysis, material selection for high-temperature/pressure environments, structural analysis
Experience with application of ASME Boiler and Pressure Vessel Code in design
Professional Engineer license, with 4+ years of work under a licensed PE
Familiarity with manufacturing processes (e.g., welding, machining, tube bundle assembly) and design for manufacturability (DFM)
Steam generator design experience in power plant or industrial boiler applications (e.g., HRSGs)
Background in failure analysis
Benefits
401K plan with an employer match
Medical/Dental /Vision Insurance
Life and Disability Insurance
Paid Time Off
Tuition Reimbursement/Professional Development policy
Company
X-energy
X-energy is a nuclear energy company that develops small modular nuclear reactors and nuclear fuels for clean energy generation.
501-1000 employees
H1B Sponsorship
X-energy has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
2024 (1)
2022 (2)
2020 (1)
Funding
Current Stage
Late StageTotal Funding
$1.71BKey Investors
Jane Street CapitalPittco ManagementDepartment for Energy Security & Net Zero
2025-11-24Series D· $700M
2025-03-05Private Equity· $22.8M
2024-10-16Series C· $700M
Leadership Team
J. Clay Sell
Chief Executive Officer
Robert Taylor
Vice President, Regulatory Affairs and Licensing
Recent News
2026-01-06
Crunchbase News
2025-12-17
Company data provided by crunchbase