X-energy · 23 hours ago
Engineer III, Plant & Process Design
Rockville, MD
Full-time
Onsite
Mid, Senior Level
$99K/yr - $165K/yr
5+ years expX-energy LLC is hiring a Plant & Process Design Engineer to support its team. This role is responsible for designing and developing mechanical systems and components while overseeing the implementation of rigorous System Engineering processes and ensuring technical integration.
Clean EnergyCleanTechEnergyNuclearRenewable Energy
Responsibilities
Execute the core tasks and responsibilities, listed in the Job Profile Task/Responsibilities section of this document, with minimal supervision
Support the assessment of SSCs for manufacturability as well as assembly and integration considerations at the direction of senior engineers
Develop mechanical/physical system design concepts, design and support development of processes to create structures, systems, and components (SSCs)
Planning/structuring scope for the analyses required to assess aspects of the SSCs to ensure they can perform their intended functions and meet design requirements and specifications
Provide independent reviews and acceptance reviews of engineering deliverables and data
Oversee documentation to applicable requirements, interfaces, design basis and criteria by coordinating with key stakeholders/systems engineers and identifying applicable industry codes and standards
Have a thorough understanding of the requirements contained within industry codes and standards and the intent which is implied
Direct the planning for the analyses required to assess all aspects of the SSCs to ensure they can perform their intended functions and meet all technical specifications and requirements
Supervise performance of computations utilizing hand calculations and analytical tools for structural, thermal, hydraulic, and other scoping calculations as required to ensure SSCs can meet all technical requirements. Oversee procured items and associated documentation for acceptance and verify compliance of procured services and material with contract specifications
Develop and manage implementation of engineering changes in accordance with approved procedures
Provide ownership, responsibility, and accountability over technical scope involving the coordination of multiple individual contributors working in a specific area
Design and develop mechanical systems and components: Understand how nuclear safety relates to system engineering and the work performed on a day-to-day occurrence. 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. Create and maintain CAD-generated engineering models. Perform computations and analyses for thermal and hydraulic systems as required to ensure SSCs can meet technical requirements. Write and develop design documentation including, but not limited to, design basis documents, technical reports, calculations, design descriptions and drawings in accordance with applicable procedures
Perform Systems Engineering processes for the designed mechanical systems and components: Demonstrate project management skills to effectively organize and lead external engineering partners. Develop the technical content for and support the procurement of material, equipment, and services. Review system engineering documentation from other systems for technical correctness and compliance with X-energy processes and procedures and participate in design reviews for other systems. Actively support the safety culture and ensure integration of quality in all System Engineering processes by complying with the relevant requirements of the Quality Assurance Program. Identify, document, report and manage system and project risks to ensure they are visible and mitigated accordingly
Perform work in accordance with X-energy quality procedures for design and configuration management to ensure project quality requirements are met
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 engineering discipline from an ABET accredited university required
Typically, five years of experience in a mechanical engineering role required (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience)
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
Typically, experience with mechanical process equipment design, procurement, installation, and/or operation is required
Systems or Design Engineering experience in successful mechanical system development projects
Experience with design and operation of mechanical systems including, but not limited to, steam, feedwater, condensate, HVAC, fire protection, drainage, compressed air, services, water-based systems, or nuclear systems
Knowledge of system requirements management, and verification
Knowledge of Systems Engineering processes, as well as relevant aspects of nuclear power plant licensing, regulatory, quality, and safety requirements
Technical proficiency in fundamentals of mechanical design for structural and fluidic components, mechanisms, or manufacturing & processing equipment
Preferred
Experience developing and/or working with system purification technologies (e.g., reverse osmosis, capacitive deionization, etc.) is a plus
Benefits
401K plan with an employer match
Medical/Dental /Vision Insurance
Life and Disability Insurance
Paid Time Off
Tuition Reimbursement/Professional Development policy that supports the continuing education of our employees
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