Lead Principle Thermal Simulation Engineer

At Jabil (NYSE: JBL) we are proud to be a trusted partner for the worlds top brands offering comprehensive engineering supply chain and manufacturing solutions. With 60 years of experience across industries and a vast network of over 100 sites worldwide Jabil combines global reach with local expertise to deliver both scalable and customized solutions. Our commitment extends beyond business success as we strive to build sustainable processes that minimize environmental impact and foster vibrant and diverse communities around the globe.

Lead / Principle Thermal Simulation Engineer

Build your career with Jabil! We challenge and empower you to make the most of your talents while working with outstanding colleagues from diverse backgrounds who share your drive and passion to make Jabil grow!

Job Summary

The lead thermal simulation engineer will lead thermal and CFD simulation activities for Battery Energy Storage System (BESS) products or other large similar products. This role is responsible for developing and executing thermal simulation strategies to evaluate temperature distribution airflow performance heat transfer pressure drop hotspot risk environmental performance derating risk and long-term reliability under normal operation high-power load profiles environmental extremes and system-level operating conditions. The position will partner closely with mechanical design system architect electrical structural safety test manufacturing quality and customer teams to optimize thermal performance manufacturability cost safety and product reliability. The role requires strong technical depth in heat transfer fluid mechanics CFD thermal modeling and BESS thermal management as well as the ability to guide cross-functional teams mentor engineers and drive simulation best practices across different design programs.

Location:

This role will be based at Jabils Huangpu office in Guangzhou Guangdong Province China.

Essential Duties and Responsibilities

• Lead thermal and CFD simulation activities for BESS products and other large similar products including battery cabinets containerized enclosures battery racks modules power electronics HVAC interfaces airflow paths and cooling architectures.
• Develop and execute thermal simulation models and analysis plans for steady-state and transient heat transfer airflow pressure drop hotspot formation environmental extremes high-power operation derating risk and thermal reliability.
• Evaluate thermal risks related to battery heat generation module and rack temperature uniformity enclosure airflow distribution HVAC capacity fan performance filtration cable/busbar heating solar loading altitude ambient temperature and service conditions.
• Partner with mechanical design system architect electrical structural safety test manufacturing quality supplier program and customer teams to define requirements acceptance criteria validation plans and design improvements.
• Correlate simulation results with physical test data field data and customer operating profiles and provide clear technical recommendations to improve performance safety manufacturability cost and reliability.
• Prepare and present simulation reports thermal margin assessments technical risk evaluations design trade studies and recommendations to internal stakeholders customers suppliers and leadership teams.
• Establish thermal simulation best practices templates workflows material/property libraries validation methods and model correlation guidelines to improve consistency efficiency and engineering quality across different design programs.
• Mentor thermal simulation engineers review technical work and support development of thermal simulation capability within the team.
• May perform other duties and responsibilities as assigned.

Job Qualifications

Technical Knowledge & Skills

• Deep understanding of heat transfer fluid mechanics thermodynamics conjugate heat transfer thermal radiation forced and natural convection pressure drop fan and blower performance and transient thermal behavior.
• Strong hands-on experience with CFD and thermal simulation tools such as ANSYS Fluent ANSYS Icepak Star-CCM FloTHERM 6SigmaET COMSOL or equivalent platforms.
• Proven ability to perform steady-state and transient CFD/thermal analysis for electronics cooling battery modules battery racks high-power electrical components HVAC-integrated enclosures and large-scale system airflow.
• Practical understanding of BESS thermal architecture including battery cell/module/rack heat generation cabinet and container airflow HVAC sizing ducting fan selection filtration venting liquid cooling features power electronics cooling and thermal interface materials.
• Ability to evaluate thermal behavior under normal operation high-rate charge/discharge long-duration operation elevated ambient temperature solar loading altitude blocked airflow component degradation and system derating scenarios.
• Strong knowledge of thermal model setup geometry simplification meshing turbulence modeling boundary condition definition heat-load development material property selection convergence assessment sensitivity studies and uncertainty evaluation.
• Ability to correlate simulation results with thermocouple data infrared imaging airflow measurement pressure-drop data environmental chamber testing system thermal testing and field performance data.
• Experience with CAD tools such as SolidWorks Creo NX CATIA or equivalent including CAD simplification large assembly management and simulation model preparation.
• Working knowledge of battery safety and BESS-related requirements including UL 9540 UL 9540A awareness NFPA 855 awareness IEC/UL product safety considerations IP/NEMA enclosure considerations and environmental reliability requirements.
• Strong technical documentation skills including clear assumptions thermal loads boundary conditions material properties results interpretation thermal margin summaries conclusions and recommended design actions.

Non-technical knowledge & skills

• Worked as part of a global team
• Effectively communicate with good understanding of English.
• Build trusted relationships and effectively influence others and share best practices.
• Assess a project and articulate risk while developing project milestones.
• Develop projects in a stage-gate process (PLCM)
• Ability to manage multiple projects and priorities meet commitments and communicate risks assumptions and dependencies proactively.
• Ability to adapt quickly to changing customer technical and business requirements while effectively managing complexity and ambiguity.
• Demonstrates ownership and accountability in overcoming challenges and delivering results under pressure.
• Mentor less experienced engineers.

Education & Experience Requirements

• Bachelors degree in Mechanical Engineering Thermal Engineering Aerospace Engineering Energy Engineering Chemical Engineering Engineering Mechanics or a related technical field is required.
• Masters degree or Ph.D. in a relevant engineering discipline is preferred especially with emphasis in heat transfer fluid mechanics CFD thermal management energy systems or numerical simulation.
• Minimum 5 years of hands-on thermal simulation CFD thermal management electronics cooling battery thermal analysis HVAC-integrated enclosure design or related engineering experience is required.
• Professional certification advanced CFD/thermal training Six Sigma DFSS NAFEMS HVAC-related training battery thermal management training or equivalent technical credentials are a plus.

Jabil including its subsidiaries is an equal opportunity employer and considers qualified applicants for employment without regard to race color religion national origin sex sexual orientation gender identity age disability genetic information veteran status or any other characteristic protected by law.

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If you are a qualified individual with a disability you have the right to request a reasonable accommodation if you are unable or limited in your ability to use or access site as a result of your disability. You can request a reasonable accommodation by sending an e-mail to or calling with the nature of your request and contact information. Please do not direct any other general employment related questions to this e-mail or phone number. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to.

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Jabil including its subsidiaries is an equal opportunity employer and considers qualified applicants for employment without regard to race color religion national origin sex sexual orientation gender identity age disability genetic information veteran status or any other characteristic protected by law.

If you are a qualified individual with a disability you have the right to request a reasonable accommodation if you are unable or limited in your ability to use or access site as a result of your disability. You can request a reasonable accommodation by sending an e-mail to with the nature of your request and contact information. Please do not direct any other general employment related questions to this e-mail. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to.

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