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Thermal Engineer Jobs in Reston, VA (NOW HIRING)

X Energy LLC

Thermal Analysis Engineer

Rockville, MD · On-site

X-energy is seeking Thermal Analysis Engineers responsible for the engineering design and development of mechanical systems, structures, and components. This includes concept development, evaluation ...

X Energy LLC

Thermal Analysis Engineer

Rockville, MD · On-site

X-energy is seeking Thermal Analysis Engineers responsible for the engineering design and development of mechanical systems, structures, and components. This includes concept development, evaluation ...

Lynk

Mechanical Engineer

Chantilly, VA · On-site

Performing thermal analyses of components and the entire system in all operational modes. * Interface with systems, harness, software, and electrical RF engineering teams to inform satellite and ...

X Energy LLC

Chemical Engineer

Rockville, MD · On-site

The focus of this engineering role is on thermal-hydraulic and process systems engineering for High-Temperature Gas-cooled Reactors (HTGRs). Responsibilities include the modeling, analysis, and ...

X Energy LLC

Chemical Engineer

Rockville, MD · On-site

The focus of this engineering role is on thermal-hydraulic and process systems engineering for High-Temperature Gas-cooled Reactors (HTGRs). Responsibilities include the modeling, analysis, and ...

Jobtailor

Mechanical Systems Engineer

Arlington, VA · On-site

$120 - $180/hr

Perform thermal analyses, heat transfer studies, airflow evaluations, and cooling assessments for ... Collaborate with systems engineers to define hardware, infrastructure, environmental, and ...

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All JobsThermal Engineer JobsThermal Engineer Jobs in Reston, VA

Thermal Engineer information

See Reston, VA salary details

$45.3K

$108.7K

$174.3K

How much do thermal engineer jobs pay per year?

As of Aug 22, 2026, the average yearly pay for thermal engineer in Reston, VA is $108,746.00, according to ZipRecruiter salary data. Most workers in this role earn between $83,200.00 and $134,200.00 per year, depending on experience, location, and employer.

What is a thermal engineer?

Thermal engineers are professionals who specialize in the study and application of heat transfer and thermodynamics. They design, analyze, and optimize systems and components that involve heating or cooling processes, such as HVAC systems, engines, electronics, and power plants. Their work is essential in industries like aerospace, automotive, electronics, and energy, where managing temperature is critical for performance and safety. Thermal engineers use advanced simulation tools and mathematical models to solve complex heat-related challenges and improve energy efficiency.

What does a thermal engineer do?

As a thermal engineer, you maintain, create, or repair mechanical systems that involve a heat transfer process into other forms of energy. You analyze how mechanical heat sources interact with different physical and industrial systems. You test various components of heat transfer within a system, which sometimes involves chemical fluids and gas. You may work with large or small-scale heating or cooling equipment, from industrial heaters to airplane engines. Other duties and responsibilities require you to work in locations in need of heat or cooling mitigation, such as a power plant or landfill. Aerospace companies, public utilities, and other industrial firms hire thermal engineers.

What are the key skills and qualifications needed to thrive as a thermal engineer, and why are they important?

To thrive as a Thermal Engineer, you need a solid background in thermodynamics, heat transfer, and fluid mechanics, typically supported by a degree in mechanical or thermal engineering. Proficiency with simulation and modeling tools such as ANSYS, MATLAB, and CFD software, as well as familiarity with industry standards, is often required. Strong analytical thinking, problem-solving abilities, and effective communication skills help distinguish top performers in the field. These skills are crucial for designing efficient thermal systems, troubleshooting performance issues, and collaborating with multidisciplinary teams to meet project goals.

What are some common challenges thermal engineers face when designing cooling systems for electronic devices?

Thermal Engineers often encounter challenges such as managing heat dissipation in increasingly compact and high-powered electronic devices, where space for cooling solutions is limited. Balancing performance, efficiency, and cost while ensuring reliability requires careful selection of materials and innovative thermal management techniques. They must also collaborate closely with electrical and mechanical engineers to integrate thermal solutions without compromising overall device functionality. Adapting to rapidly evolving technologies and staying updated on industry standards is essential for long-term success in this role.

What is the difference between Thermal Engineer vs Mechanical Engineer?

AspectThermal EngineerMechanical Engineer
CredentialsBachelor's or Master's in Mechanical, Mechanical Engineering, or ThermodynamicsBachelor's or Master's in Mechanical Engineering or related field
Work EnvironmentDesigning thermal systems, heat transfer analysis, HVAC, aerospace, electronics coolingDesigning mechanical systems, structural components, manufacturing processes
Industry UsageElectronics, aerospace, HVAC, energy systemsAutomotive, manufacturing, robotics, aerospace

Thermal Engineers specialize in heat transfer, thermodynamics, and thermal system design, often working on electronics cooling and energy systems. Mechanical Engineers have a broader scope, covering mechanical design, structural analysis, and manufacturing. While both roles require similar educational backgrounds, Thermal Engineers focus more on thermal aspects within various industries, whereas Mechanical Engineers handle a wider range of mechanical systems.

How much do thermal engineers get paid?

Thermal engineers typically earn between $70,000 and $110,000 annually, depending on experience, location, and industry. Senior roles or those with specialized skills in heat transfer analysis or CFD software can earn higher salaries, often exceeding $120,000. Compensation may also include benefits such as bonuses and professional development opportunities.

Is thermal engineering in demand?

Thermal engineering is in demand across industries such as aerospace, automotive, energy, and manufacturing, where thermal management and heat transfer are critical. The role often requires knowledge of thermodynamics, heat transfer analysis, and simulation tools, with job growth driven by advancements in technology and sustainable energy solutions.
More about Thermal Engineer jobs

What are popular job titles related to Thermal Engineer jobs in Reston, VA?

For Thermal Engineer jobs in Reston, VA, the most frequently searched job titles are:

What cities near Reston, VA are hiring for Thermal Engineer jobs?

Cities near Reston, VA with the most Thermal Engineer job openings:

Thermal Engineer jobs near you
Infographic showing various Thermal Engineer job openings in Reston, VA as of August 2026, with employment types broken down into 92% Full Time, 4% Part Time, and 4% Contract. Highlights an 86% Physical, 6% Hybrid, and 8% Remote job distribution, with an average salary of $108,746 per year, or $52.3 per hour.

Thermal Analysis Engineer

X Energy LLC

Rockville, MD • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 18 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 Thermal Analysis Engineers 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.
  • Support the development of reactor and plant control philosophy and implement in plant models, simulations, and digital twins.
  • Support the sizing and analysis of components including heat exchangers, pumps, circulators, and turbomachinery.
  • Perform system-level thermodynamic analyses and process design using system-level simulation codes to support design iterations of X-energy developed reactors and supporting subsystems.
  • 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.

Qualifications
  • Bachelor's degree in mechanical engineering, or related engineering discipline (e.g., nuclear aerospace, chemical, etc.) from an accredited institution required.
  • Level I: Typically, zero years of experience in an engineering role required.
  • Level II: Typically, two years of experience in an engineering role required.
  • Level III: Typically, five years of experience in an engineering role required.
  • Proficiency with engineering hand calculations is required.
  • Use of 1D flow-solvers performing heat/energy and mass balance (e.g., RELAP, Flownex, NPSS, SINDA/FLUINT, Flomaster, or similar).

Location: 9801 Washingtonian Boulevard, Gaithersburg, Maryland
Work Site Expectations: 4 days in office
Travel Expectations: Up to 10% as needed
Hours: 8:00am - 5:00pm, 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 I: $75,000 - $100,000 Level II: $95,000 - $120,000 Level III: $115,00- $140,000
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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