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Internship Energy Modeling Jobs in Washington (NOW HIRING)

X Energy LLC

Mechanical Design Engineer

Rockville, MD · On-site

$77K - $105K/yr

X-energy LLC conducts a thorough recruiting process and will never issue offers without interview ... Create and maintain CAD-generated engineering models of reactor SSCs. * Support the assessment of ...

X Energy LLC

Mechanical Design Engineer

Rockville, MD

$77K - $105K/yr

X-energy LLC conducts a thorough recruiting process and will never issue offers without interview ... Create and maintain CAD-generated engineering models of reactor SSCs. * Support the assessment of ...

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Internship Energy Modeling information

What is an internship in energy modeling?

An Internship in Energy Modeling is a temporary position where students or recent graduates gain practical experience working with simulation tools and software to analyze the energy performance of buildings, systems, or processes. Interns assist senior engineers or analysts by developing models, running simulations, and interpreting data to help improve energy efficiency and sustainability. This role provides hands-on exposure to the principles of energy modeling, building codes, and green building certifications, making it an excellent stepping stone for a career in energy or environmental engineering.

What typical projects might an intern in energy modeling work on, and how do these contribute to the team’s overall objectives?

As an intern in energy modeling, you may assist with creating and analyzing building energy simulations, evaluating the impact of various energy conservation measures, or updating existing models with new data. These projects not only help you develop technical skills with industry-standard software but also provide valuable insights for the team to optimize energy use and support sustainability goals. Your work contributes directly to client deliverables and helps inform larger energy strategies, making your role integral to the team's mission.

What are the key skills and qualifications needed to thrive as an energy modeling intern, and why are they important?

To thrive as an Energy Modeling Intern, you typically need a background in engineering, architecture, or environmental science, along with strong analytical and quantitative skills. Familiarity with energy modeling software such as eQUEST, EnergyPlus, or IESVE, and proficiency in tools like Excel or Python, is highly valuable. Attention to detail, effective communication, and the ability to work collaboratively enhance your contributions in this role. These skills ensure accurate analysis, clear reporting, and successful teamwork in projects focused on optimizing building energy performance.

What is the difference between Internship Energy Modeling vs Energy Analyst?

AspectInternship Energy ModelingEnergy Analyst
CredentialsTypically pursuing or recent graduate in engineering, environmental science, or related fieldsBachelor's or master's in energy, environmental science, or related disciplines; certifications like LEED or AEE beneficial
Work EnvironmentInternship setting, often in consulting firms, utilities, or energy companiesFull-time professional role in similar environments, with more responsibility
Job FocusAssisting with energy modeling, data collection, and analysisPerforming detailed energy analysis, reporting, and project development

Internship Energy Modeling provides hands-on experience in energy modeling tools and data analysis, ideal for students or recent graduates. In contrast, an Energy Analyst is a full-time role requiring more expertise and responsibility in analyzing energy systems and advising on projects. Both roles are essential in the energy industry but differ mainly in experience level and scope of work.

What are popular job titles related to Internship Energy Modeling jobs in Washington?

For Internship Energy Modeling jobs in Washington, the most frequently searched job titles are:

What job categories do people searching Internship Energy Modeling jobs in Washington look for?

The top searched job categories for Internship Energy Modeling jobs in Washington are:

What cities in Washington are hiring for Internship Energy Modeling jobs?

Cities in Washington with the most Internship Energy Modeling job openings:

Internship Energy Modeling jobs near you
Infographic showing various Internship Energy Modeling job openings in Washington as of August 2026, with employment types broken down into 79% Full Time, 20% Part Time, and 1% Contract. Highlights an 93% Physical, 3% Hybrid, and 4% Remote job distribution.

Mechanical Design Engineer

X Energy LLC

Rockville, MD • On-site

$77K - $105K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 12 days ago

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
X-energy is seeking professionals to join our Mechanical Engineering team in the role of Mechanical Design Engineer to support the development of the Xe-100. This role is responsible for the engineering design and development of mechanical systems, structures, and components such as Reactor Internal Structures, Steam Generator System, Helium Circulator System, Graphite Core Components, Reactor Cavity Cooling System, or Nuclear Auxiliary Systems. 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.
  • Maintain professional demeanor and behavior at all times in all forms of communication.
  • Perform other duties as assigned by manager.

Minimum Qualifications
  • Bachelor's degree in mechanical engineering, or related engineering discipline (e.g., nuclear aerospace, chemical, etc.) from an accredited institution required.
  • Proficiency with engineering hand calculations is required.
  • Experience designing and developing mechanical or fluid systems, assemblies, or components.
  • 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.
  • Hardware ownership including manufacturing and testing oversight.
  • Experience in use of Computer-Aided Design (CAD) and product lifecycle management (PLM) software (e.g UG/NX, Solidworks, Pro-Engineer, Teamcenter, Windchill, or similar).

Preferred Qualifications
  • Experience with commercial nuclear power plant operations.
  • 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 Process Equipment (Piping, Ducting, HVAC, Fire Suppression, Pumps, Pressure Vessels, Piping, Valves, Structural Supports) selection, sizing, and specification development
  • Hands-on experience with graphite or other non-metallic components, fabrication or assembly sequencing, and/or tooling development preferred. Experience with procurement and manufacturing oversight of pressure vessel or large metallic components.

Job Level Qualifications:
  • Level II
    • Level Tasks/Responsibilities
      • Support team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, under guided supervision.
      • Coordinate with engineering team members, partners, and suppliers to facilitate the convergence of efforts, allow design closure, provide design assurance, and deliver high quality engineering work products.
    • Level Minimum Qualifications
      • Typically, three years of experience in an engineering role 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.
  • Level III
    • Level Tasks/Responsibilities
      • Execute the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, with minimal supervision.
      • Provide ownership, responsibility, and accountability over technical scope involving the coordination of multiple individual contributors working in a specific area.
    • Level Minimum Qualifications
      • Typically, five years of experience in an engineering role 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.
  • Level IV
    • Level Tasks/Responsibilities
      • Lead the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document, without close supervision and some latitude for independent judgement.
      • Provide feedback and guidance to more junior team members with the execution of the core tasks and responsibilities listed in the Job Profile Task/Responsibilities section of this document.
      • Lead small groups of engineers to solve complex technical problems and deliver high quality engineering work products on time and within budget.
    • Level Minimum Qualifications
      • Typically, ten years of experience in an engineering role 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.
  • Level V
    • Level Tasks/Responsibilities
      • 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.
    • Level Minimum Qualifications
      • Typically, fifteen years of experience in an engineering role 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.

Location: 9801 Washingtonian Boulevard, Gaithersburg, Maryland
Work Site Expectations: 4-5 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:
level II: $95,000 - $120,000 level III: $115,000 - $140,000 Level IV: $140,000 - $170,000
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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