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Thermal Engineer
West Peoria, ILMarch 23rd, 2026
Job Title: Mechanical Engineer (Thermal Systems Engineer)Location: Mossville, IL (onsite)Duration: 12 months contract with possibility to extendPay range: $44/hr to $49/hr on W2 (all inclusive)Position Summary:The Senior Thermal Systems Engineer will lead the design, analysis, and development of thermal systems for battery modules. This includes performing CAE, maturing current designs, developing new concepts, and supporting technology advancement to ensure robust, efficient thermal performance.Key ResponsibilitiesThermal System & Product DesignLead the design and development of battery module thermal systems and associated components.Conduct CAE simulations using tools such as FlowEFD, Ansys, or Star‑CCM+.Mature ongoing thermal system designs to drawing release and final production.Develop new thermal concepts and drive continuous improvements across the product lifecycle.Project OwnershipTake extreme ownership of assigned components—from initial concept through design, manufacturing, validation, and production release.Ensure high‑quality, reliable designs that meet performance and safety requirements.Cross‑Functional CollaborationPartner daily with the battery module and battery system engineering teams.Support new technology development initiatives and integration efforts.Required QualificationsBachelor’s degree in Mechanical Engineering, Thermal Engineering, or a related discipline (Master’s degree acceptable with 6+ years relevant experience)8+ years of industry experience in mechanical or thermal system designStrong background in: Battery module/pack thermal designThermal system integrationCAE tools: FlowEFD, Ansys, Star‑CCM+No two‑year degrees acceptedInternships do not count as part of required experienceExperience in similar roles such as Senior Mechanical Design EngineerAdditional Technical RequirementsRequiredThermal engineering fundamentalsMechanical engineering principlesDesiredExperience in battery technologies and advanced energy storage systemsUnderstanding of manufacturing processes for thermal componentsSoft SkillsStrong team player with a collaborative mindsetHighly self‑motivated and proactiveWillingness to take ownership and drive projects to completion
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