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Mechanical Systems Design Engineer

Job

Dice.com | X Energy, LLC

Rockville, MD (In Person)

Full-Time

Posted 3 days ago (Updated 1 day ago) • Actively hiring

Expires 6/25/2026

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Job Description

Mechanical Systems Design Engineer Skills
  • Recruiting
  • Systems Design
  • Engineering Design
  • Concept Development
  • Evaluation
  • Prototyping
  • FOCUS
  • Interfaces
  • Specification Gathering
  • Design Documentation
  • Verification And Validation
  • Analytical Skill
  • Configuration Management
  • Functional Requirements
  • Forms
  • Communication
  • Aerospace
  • Computer Aided Design (CAD)
  • Product Lifecycle Management
  • Plant Lifecycle Management
  • Computer Hardware
  • Metrology
  • Inspection
  • Instrumentation
  • Testing
  • Machining
  • Licensing
  • HVAC
  • Procurement
  • Manufacturing
  • Graphite
  • Assembly
  • Mechanical Engineering
  • Accountability
  • Collaboration
  • Quality Assurance
  • Budget
  • Supervision
  • Mentorship
  • Research
  • Project Management
  • Performance Management
  • Preventive Maintenance
  • Law
  • Training
  • Market Analysis
  • Insurance
  • Professional Development
SAP BASIS
  • Energy
  • English
  • Spanish
  • SummaryX-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 ;br>Job DescriptionOur Mechanical Systems Design Engineer is responsible for the engineering design and development of mechanical systems, structures, and components. This includes concept development, evaluation of concepts, analysis of systems, structures, and components for their ability to perform their intended function, and ensuring they meet all technical specifications and requirements. The role will ensure the development of the systems and components through production including any necessary prototyping, testing, and commissioning.

Responsibilities
  • Develop mechanical/physical concepts, design and support development of processes to create or identify structures, systems, and components (SSCs) for use in nuclear products or facilities with a focus on nuclear safety.
  • 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 and the direction of project leads and systems engineers.
  • 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.
  • Develop innovative mechanical solutions to refine and deploy concepts, technologies, and designs associated with X-energy developed reactors, including pressure vessels and piping, reactor internals, nuclear fuel, and high temperature materials such as graphite.
  • Integrate design activities across engineering team members, partners, and suppliers and perform supporting scoping and sizing calculations to downselect design features to meet design requirements using guidance from consensus codes and standards.
  • Create and maintain CAD-generated engineering models of reactor SSCs.
  • Support the assessment of SSCs for manufacturability as well as assembly and integration considerations at the direction of project leads.
  • Write and develop design documentation including design basis documents, technical reports, calculations, and drawings in accordance with applicable procedures.
  • Develop Verification and Validation (V&V) plans for analytical tools and support qualification of toolset.
  • Perform work in accordance with X-energy quality procedures for design and configuration management to ensure project quality requirements are met.
  • Provide independent reviews and acceptance reviews of engineering deliverables and data.
  • Lead the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, without close supervision and extensive latitude for independent judgement.
  • Teach and mentor more junior team members.
  • Stay abreast of industry and academic trends, breakthroughs, and best practices.
  • Maintain professional demeanor and behavior at all times in all forms of communication.
  • Perform other duties as assigned by manager.
Qualifications
  • Bachelor's degree in mechanical engineering, or related engineering discipline (e.g., nuclear aerospace, chemical, etc.) from an accredited institution required.
  • 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.
  • Proficiency with engineering hand calculations is required.
  • Use of Computer-Aided Design (CAD) and product lifecycle management (PLM) software.
  • Hardware ownership including manufacturing and testing oversight.
  • One plus years of demonstrated hands-on experience developing and delivering hardware or manufacturing processes in a production environment is required. May include industry internship experience, hobby, or participation in collegiate engineering projects such as: Formula SAE, Baja SAE, Design Build Fly, Rocket Club, etc.
  • Designing and developing mechanical or fluid systems, assemblies, or components.
Preferred Skills
  • Experience with commercial nuclear power plant operations.
  • Experience using hand-tools and handling equipment to assemble mechanical systems or components.
  • Familiarization with metrology techniques for inspection of components, performing fit checks, and troubleshooting mechanical issues.
  • Familiarization with selection and use of instrumentation for testing and characterizing performance of mechanical systems and components.
  • Experience working in hazardous industrial or manufacturing environments with prior training in areas such as: Pressurized or Stored Energy, High/Low Voltage Safety, Lockout/Tagout, Hoist/Rigging Operations, Machining, Hazard Awareness, etc...
  • Professional experience in commercial nuclear power as well as design, qualification, licensing, and construction to ASME Boiler & Pressure Vessel Code (BPVC) Section III and/or Section VIII.
  • Experience with NRC regulations and licensing requirements for safety-related systems.
  • Experience with design using
ASME BPV
Code, ASME B31.1 or B31.3, and other industry standards.
  • Experience with mechanical design of heat exchangers, boilers, or steam generators.
  • Experience with Mechanical Process Equip.
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