Thermal Hydraulics

Thermal Hydraulics Engineer Jobs

11 jobs found

11d ago

Deterministic Safety Analysis (DSA) Engineer II

Holtec Camden, NJ

Camden, NJ

11d ago

$110k - $135k/yr Full time Analyst DBA Design

Apply Now

Job Description

Holtec offers a role focused on deterministic safety analysis for the SMR-300, within a culture that prioritizes safety, collaboration, and professional growth. This hybrid position is based in Camden, New Jersey, and comes with a competitive salary and comprehensive benefits from day one.

Salary: USD 110,000 - 135,000 per year

Benefits

Industry leading medical, dental, and vision coverage with a generous employer premium contribution and day one eligibility
FLEX Program offering hybrid work opportunities for eligible roles where business needs allow
401(k) retirement plan with up to a 5% company match and immediate vesting
Paid time off plus 11 paid holidays
Wellness program with rewards for participating in company health initiatives
Commuter benefits supporting mass transit and commuter parking
Company paid life and AD&D insurance
Education assistance to support ongoing education and professional growth
Employee support and voluntary benefits, including an Employee Assistance Program and optional coverage such as disability, legal, identity theft, and other insurance programs

Note: Benefits eligibility and offerings may vary based on role, location, and employment status.

Responsibilities

Create and execute deterministic safety analyses to show SMR-300 safety and licensing compliance
Assess reactor behavior during anticipated operational occurrences and design basis accidents, including thermal-hydraulic response, core performance, and radiological consequences
Examine key plant systems such as the reactor core, reactor coolant system, engineered safety features, and containment
Assist in preparing licensing documentation, including safety analysis reports and responses to regulatory inquiries
Develop, maintain, and apply analytical methods and computer models used in safety analyses
Conduct verification and validation of analysis codes to ensure accuracy, reliability, and regulatory compliance
Collaborate with multidisciplinary engineering teams to integrate design inputs into safety evaluations
Produce detailed technical reports, calculations, and documentation in line with quality assurance standards such as NQA-1
Ensure analyses are traceable and reproducible and adhere to regulatory and industry requirements

Requirements

Bachelor of Science in nuclear engineering, mechanical engineering, or a closely related field from an accredited college or university
Knowledge of thermal-hydraulic behavior of light water reactors
Experience with industry safety codes such as RELAP5, RETRAN, COBRA, VIPRE, GOTHIC, etc
Minimum of three years of experience developing or applying LWR safety analysis codes and methods
Strong technical writing, interpersonal, and communication skills
Eligible to work under 10 CFR Part 810

Technologies

RELAP5
RETRAN
COBRA
VIPRE
GOTHIC

Location

Camden, NJ, with hybrid work options available

View full job page →

17d ago

Lead Engineer – Energy Systems

GE Vernova Niskayuna, NY

Niskayuna, NY

17d ago

$89k - $149k/yr Full time Ansys Design Engineering Energy Modeling

Apply Now

Job Description

GE Vernova Advanced Research seeks a Lead Engineer – Energy Systems in Niskayuna, NY (onsite). The role offers a competitive salary range of USD 89,300 to 148,700 per year and supports pursuing impactful energy technology from concept through lab to pilot validation. This position emphasizes turbomachinery, heat transfer, and cross-disciplinary collaboration, with strong opportunities to contribute to national-scale energy solutions. The work location is onsite in Niskayuna, and U.S. work authorization is required.

Benefits

Relocation support to ease the transition
Medical, dental, vision, and prescription coverage
Health coaching and ongoing wellness resources
Employee Assistance Program available 24/7
GE Vernova Retirement Savings Plan with company matching
Financial planning resources and guidance
Tuition assistance for continuing education
Adoption assistance
Paid parental leave
Disability and life insurance
12 paid holidays and permissive time off
Discretionary annual bonus potential

Responsibilities

Lead the design, modeling, and conceptualization of high temperature and high pressure thermal and fluid systems, including advanced power cycles and components
Apply advanced CFD and process/cycle modeling to optimize turbomachinery and energy-system elements
Develop techno-economic analyses to evaluate life cycle economics and performance of novel components
Plan and conduct advanced laboratory-scale tests to validate component and system performance
Create design, commissioning, and testing plans with process diagrams and standard operating procedures for lab and plant scale projects
Develop and manage R&D proposals for government agencies and external partners
Collaborate across GE Vernova units and with national labs, academia, vendors, and customers
Translate experimental data and TEA results into actionable business insights
Pursue patents and establish a publication track through conferences and journals

Requirements

PhD in Mechanical Engineering or a related field, with 3+ years of professional R&D experience in industry, a postdoctoral role, or at a national lab
Experience in applied thermodynamics and thermal systems, analyzing complex cycles, heat transfer, and fluid mechanics to design and optimize energy systems
Hands-on design, modeling, and performance analysis of turbomachinery and integrated energy systems (3+ years)
Track record translating novel concepts into tangible component designs and integrated system development
Experience shaping and executing government-funded R&D proposals, managing technical milestones and compliance for agencies such as DOE or DOD
Legal authorization to work in the United States
Willingness to work at the Niskayuna, NY office location
This role requires a U.S. Person (green card holder or U.S. citizen)

Technologies

Python
MATLAB
Ansys
OpenFOAM
COMSOL
Aspen

Desired characteristics

Expertise in design, analysis, steady-state and transient modeling, testing, and development of advanced power cycles
Experience designing and building experimental test rigs
Strong record of peer-reviewed publications, conference presentations, and patents
Proficiency in Python and MATLAB for data analysis and post-processing
Fluency with CFD tools (Ansys, OpenFOAM, COMSOL) and process-simulation tools (Aspen)
Experience conducting TEA and life cycle assessments for complex energy systems
Mentoring experience for graduate students or junior researchers and commitment to technical excellence and safety
Ability to manage multi-stakeholder relationships across academic partners, national labs, and industrial consortia
Strong interpersonal and communication skills and the ability to work effectively in multidisciplinary teams

View full job page →

21d ago

Sr. Research Engineer - Combustion / CFD

Rheem Manufacturing Roswell, GA

Roswell, GA

21d ago

Full time Senior Ansys CFD

Apply Now

Job Description

The Sr. Research Engineer for CFD role at Rheem Manufacturing focuses on advancing combustion and computational fluid dynamics across water heating and air handling platforms. The position involves mentoring engineers, driving simulation-driven product improvements, and partnering with cross-functional teams to embed simulation into the product lifecycle.

Responsibilities

Perform CFD simulations to examine combustion and related flow phenomena in water heating and air handling systems.
Develop and implement models for combustion processes, chemical kinetics, heat transfer, and turbulence.
Leverage commercial or open-source CFD tools such as StarCCM+, ANSYS Fluent, CONVERGE, and OpenFOAM to solve complex fluid dynamics problems.
Advance simulation capabilities in CFD, FEA, acoustics, casting, and optimization to support research and new product introductions across water heating and air product lines.
Collaborate with design teams to clarify scope and select appropriate simulation principles and tools for each task.
Coordinate with product development teams to plan experiments and implement simulation findings into design decisions.
Explore new technologies for product value through first principles analysis and 1D or 3D simulation approaches.
Maintain awareness of emerging simulation technologies and methodologies to keep the team at the leading edge of industry practice.

Requirements

Bachelor's degree in Mechanical, Aerospace, or Chemical Engineering
Minimum of five years of experience in industrial simulations, R&D development, and product development
Proven track record in evaluating, analyzing, optimizing, qualifying, and implementing thermal solutions for consumer or industrial products
Strong foundation in thermodynamics, fluid dynamics, combustion physics, and chemical kinetics
Proficiency with CFD tools such as ANSYS Fluent, StarCCM+, CONVERGE CFD, OpenFOAM, or equivalent software
Strong analytical and problem-solving abilities with a history of delivering innovative engineering solutions
Effective communication and interpersonal skills, with the ability to collaborate across functional teams
Demonstrated capability as a technical expert and advisor, guiding complex simulation challenges and engineering decisions
Ability to prioritize and manage simulation activities across projects, including planning, execution, and delivery of results

Technologies

StarCCM+ (Star-CCM+)
ANSYS Fluent
CONVERGE CFD
OpenFOAM

Benefits

401(k)
Dental insurance
Flexible schedule
Parental leave
Tuition reimbursement

Work Location

Hybrid remote work arrangement in Roswell, Georgia 30076.

View full job page →

1mo ago

Cryogenic & Thermal Systems Engineer

American Superconductor NE Ayer, MA

Ayer, MA

1mo ago Closed

$140k - $180k/yr Full time Design Engineering Engineering Hydraulics

This position is no longer accepting applications (closed Jul 21, 2026).

Job Description

American Superconductor NE seeks a Cryogenic and Thermal Systems Engineer to design, analyze, integrate, and test cryogenic and superconducting systems for advanced power applications. The role emphasizes thermal and hydraulic analysis, performance evaluation, and cross-disciplinary engineering collaboration, based onsite in Ayer, MA, with a annual salary range of USD 140,000 to 180,000. A Bachelor's degree and at least 10 years of relevant experience are required.

Responsibilities

Conduct thermal and hydraulic analyses of cryogenic and superconducting systems to support product development and customer projects.
Support the design, integration, and testing of cryogenic cooling systems, piping, and associated equipment.
Develop engineering calculations, models, and simulations addressing heat transfer, fluid flow, thermal performance, and system operation.
Analyze system performance data and recommend design improvements to enhance efficiency and reliability.
Assist with laboratory testing, prototype evaluations, and system validation activities.
Collaborate with electrical, mechanical, manufacturing, and project engineering teams to deliver robust products and customer deliverables.
Support troubleshooting, root cause investigations, and corrective action development across systems.
Prepare technical reports, test procedures, engineering documentation, and customer-facing deliverables.
Engage with suppliers and conduct technical evaluations of cryogenic system components and equipment.
Assist in developing and executing qualification and reliability testing programs.
Participate in customer and project meetings to provide technical support and engineering expertise.
Maintain awareness of emerging technologies and industry developments related to cryogenic and superconducting systems.
Other duties as assigned to support program goals and timelines.

Requirements

Bachelor's degree in an engineering field.
Minimum of 10 years of experience performing complex thermal and hydraulic analyses for engineered systems.
Strong preference for experience with cryogenic refrigeration systems, liquid gas systems, superconducting technologies, rotating machinery, or energy infrastructure.
Advanced knowledge of thermodynamics, heat transfer, fluid mechanics, and hydraulic system design.
Experience utilizing thermal-fluid modeling and simulation tools.
Ability to develop engineering models and perform system-level performance analyses.
Experience working with cryogenic refrigeration systems and low-temperature fluids such as liquid helium or liquid nitrogen preferred.
Demonstrated ability to lead technical projects and influence engineering decisions across disciplines.
Basic vacuum system knowledge and the ability to analyze a vacuum system.
CFD skills are a plus.

Technologies

View full job page →

1mo ago

Nuclear Engineer III/IV(Thermal Hydraulics)

Fissionaire Madison, WI

Madison, WI

1mo ago Closed

$125k - $189k/yr Full time Senior Engineering Hydraulics

This position is no longer accepting applications (closed Jul 12, 2026).

Job Description

Fissionaire seeks a Nuclear Engineer III/IV with a focus on thermal hydraulics in Madison, WI (onsite), offering USD 125,000 to 189,000 per year and requiring a bachelor’s degree.

Responsibilities

Perform thermal-hydraulic design and analysis for molten salt reactor systems, including salt loops, storage tanks, heat exchangers, and power conversion, covering startup, steady-state, and transient conditions.
Develop specifications and assist in the design of key components such as heat exchangers, pumps, valves, instrumentation, and fluid-transfer systems.
Support integration of reactor loops with heat rejection and power conversion systems as needed.
Create and maintain thermal-hydraulic models using appropriate software tools.
Contribute to safety analyses for licensing-basis and beyond-design-basis events, including loss-of-flow, loss-of-heat-sink, reactivity transients, and freeze/thaw scenarios.
Specify and assist in selecting instrumentation relevant to monitoring thermal-hydraulic performance.
Lead and perform thermal-hydraulic testing, including separate-effects tests, integral tests, and validation experiments for model benchmarking.
Support design requirements, safety classifications, and functional specifications in alignment with nuclear standards.
Conduct uncertainty quantification, sensitivity studies, and verification and validation of thermal-hydraulic models.
Assist licensing efforts by preparing technical reports, addressing regulatory questions, and providing thermal-hydraulic justification for design decisions.
Help define a growth strategy for the team, including role definition, recruitment, mentoring, and building a high-performing thermal-hydraulics group as the project matures.
Maintain thorough documentation, including design basis reports, calculation packages, and QA-compliant testing records and configuration management.

Requirements

Bachelor’s degree in Nuclear Engineering, Mechanical Engineering, Chemical Engineering, or a closely related field; Master’s or PhD strongly preferred.
At least 10 years of direct experience in thermal-hydraulic analysis and design, with a minimum of 5 years in safety-critical or highly regulated environments.
Expertise in thermal-hydraulic phenomena for liquid-cooled systems, including single- and two-phase flow, heat transfer, natural circulation, and transient analysis.
Proficiency with system-level and CFD modeling tools applicable to nuclear or high-temperature applications.
Familiarity with nuclear safety analysis methods and regulatory requirements for thermal-hydraulic performance.
Experience designing and interpreting thermal-hydraulic experiments and test data.
Ability to address instrumentation challenges in extreme environments.
Proven track record in leading technical efforts, developing and executing test programs, and building teams.
Strong understanding of nuclear quality assurance practices.
Excellent analytical, problem-solving, and communication skills.
U.S. citizenship or permanent residency is required.

Experience

Direct thermal-hydraulic analysis and design experience: 10 years (preferred).

Work Location

Onsite in Madison, Wisconsin.

Benefits

Competitive salary with equity options
Comprehensive benefits package including health, dental, life and vision insurance
Holiday and paid time off schedule
Relocation assistance
Opportunity to work with a groundbreaking, advanced nuclear startup

View full job page →

1mo ago

Mechanical Engineer – Data Center Cooling

TMP Worldwide India Private Limited for ERS US Charlotte, NC

Charlotte, NC

1mo ago Closed

$37 - $50/hr Full time Chillers Data Center Data Centers

This position is no longer accepting applications (closed Jul 2, 2026).

Job Description

This onsite role in Charlotte, NC offers a comprehensive benefits package and a collaborative work culture. The position provides an hourly pay range of $37.02 to $50.00, plus 401(k), health, dental and vision insurance, paid time off, and relocation assistance to support your transition.

Responsibilities

Perform thermal analyses and simulations to assess system performance across diverse operating conditions and environments.
Collaborate with product management, engineering, and manufacturing to define project requirements and deliver practical cooling solutions.
Assist in designing and developing chiller systems, including component selection, system integration, and performance optimization.
Support product testing and validation activities, analyze results, and implement design improvements.
Stay current with industry trends, emerging technologies, and best practices in thermal systems engineering.
Design components, assemblies, and packaging, and use data management systems to track and report progress of assignments.
Verify drawing content for accuracy and completeness while adhering to industry design standards.
Complete design tasks using PLM workflows.
Maintain quality and accuracy of work and meet hard schedule deliverables.
Present designs in group settings and run meetings.
Develop consensus in cross-functional settings.
Manage and maintain project data with appropriate tools.

Requirements

HVAC: 3 years of experience required.
Must be able to commute to 28208 in Charlotte, NC.
Relocation to Charlotte, NC 28208 required before start.

Technologies

PLM workflows

Benefits

401(k)
Dental insurance
Health insurance
Paid time off
Relocation assistance
Vision insurance

Compensation

Pay range: $37.02 per hour to $50.00 per hour.

View full job page →

1mo ago

Fired Equipment/Heat Engineer

John L. Lowery & Associates, Inc. Baton Rouge, LA

Baton Rouge, LA

1mo ago Closed

$80 - $85/hr Full time Boilers Design Engineering

This position is no longer accepting applications (closed Jun 27, 2026).

Job Description

John L. Lowery & Associates, Inc. offers an onsite Fired Equipment / Heat Engineer role in Baton Rouge, Louisiana. The position provides an hourly rate of USD 80 to 85 and benefits that include a 401(k) plan and dental insurance. A Bachelor’s Degree in Engineering is required. The role centers on designing, developing, implementing, and analyzing technical products and systems related to fired equipment and heat engineering, with emphasis on engineering design evaluations and quality improvements. A wide degree of creativity and latitude is expected, and you may own projects from initial concept through execution.

Benefits

401(k)
Dental insurance

Responsibilities

Design, develop, implement, and analyze technical products and systems in the fired equipment and heat engineering space.
Conduct equipment engineering design evaluations to support quality and performance goals.
Potentially develop a range of products aligned with project needs.
Recommend alterations to development and design processes to enhance product quality and procedures.
Plan and accomplish goals using established experience and sound judgment.
Handle a variety of complex tasks requiring thoughtful problem solving.
Operate with a broad degree of creativity and latitude.

Requirements

Bachelor’s Degree in Engineering and/or relevant experience in a closely related role
Strong knowledge of fired equipment standard concepts, practices, and procedures within the field
Ability to anticipate and solve problems by integrating knowledge from multiple areas
Works with limited supervision, but may report to a supervisor or manager
Owns projects and takes responsibility for their outcomes
Represents the local workgroup internally and, on occasion, externally