Thermal Systems Simulation Engineer

Thermal Systems Simulation Engineer

Cooling Systems | 1-D & CFD Simulation | Electrification & Engine Applications

Full-Time | On-Site | 2+ Years Experience

Diversified Services Network, Inc. (DSN) is seeking a full-time Thermal Systems Simulation Engineer to join our team in Mossville, IL! We offer full benefits, PTO, 401k, and more! If you have a strong foundation in thermo-sciences and a passion for applying simulation tools to solve real-world cooling challenges across engine and electrification platforms within an extremely reputable, stable Fortune 500 company — let’s talk!

Position Overview

We are seeking a Thermal Systems Simulation Engineer to develop and validate cooling systems used in construction, mining, power generation, marine, and locomotive applications — spanning both internal combustion engines and battery electric systems — fully on-site in Mossville, IL. Using 1-D and 3-D simulation tools, you will provide simulation support for electrification projects across various platforms and perform cooling performance simulation for diesel-powered applications. This role requires strong collaboration with design, system, and validation partners to deliver validated solutions against challenging program timelines.

Key Contributions & Responsibilities

• Conduct application-specific cooling system analysis; develop cooling system layouts and optimize cooling air and water systems using 1-D simulation tools for up-front system sizing and component selection.
• Perform high-end Computational Fluid Dynamics (CFD) simulation for virtual design and validation — including component CFD to determine performance characteristics of heat exchangers, pumps, radiators, and aftercoolers.
• Develop CFD models to understand airflow through cooling packages and underhood thermal models to predict component temperatures.
• Collaborate with design partners to meet technical and regulatory requirements; correlate analysis models with test engineers to validate simulation accuracy.
• Perform analysis to assist in resolving cooling-related field problems; determine root causes of issues and communicate design improvement recommendations to product development teams.
• Help establish technical requirements and specifications for new products; contribute to continuous improvements in simulation methods and processes.

Team Structure & Work Environment

• You will collaborate closely with design, system, and validation partners across multiple product development teams, managing multiple projects and priorities simultaneously.
• This is a fully on-site role in Mossville, IL.

Requirements

Education & Experience

• Bachelor’s degree in Mechanical, Agricultural, Aerospace Engineering, or a similar field required; Mechanical, Agricultural, or Aerospace preferred. Experience requirements: 2+ years with a Bachelor’s degree; 1+ year with a Master’s degree; or a Doctorate degree.
• At least 1 year of engineering experience focused on cooling system performance for product development, with 1-D and/or CFD simulation experience.

Required Technical Skills

• Strong background in thermo-sciences — coursework or applied experience in fluid mechanics, thermodynamics, and heat transfer.

Desired Technical Skills

• 1-D or 3-D cooling component or system analysis experience; experience using 1-D tools such as GT-Suite.
• Proficiency with CFD tools such as Fluent, Star CCM+, or OpenFOAM; proficiency with meshing tools such as ANSA or ANSYS Workbench/SpaceClaim.
• Experience using CAD packages such as Creo.
• Proficiency in at least one programming language such as Python, C++, or Java.
• Working knowledge of diesel engines, powertrain cooling, lubrication systems, and/or electrification systems.
• Knowledge of product development processes for machines, engines, and battery/electric systems.

Required Soft Skills

• Excellent verbal, written, and presentation communication skills — able to convey technical information clearly to team members, process partners, and stakeholders.
• Strong project management skills — able to handle multiple concurrent projects and shifting priorities effectively.
• Ability to work collaboratively in a team environment across design, test, and program teams.

Benefits

• 401(k)

• Dental insurance
• Vision Insurance
• Disability insurance
• Employee assistance program
• Health insurance
• Health savings account
• Life insurance
• Paid time off
• Paid Holidays

Please follow the link to our website for a list of job openings in Engineering, IT, Project Management, and more!

Salary expectations: 65,000-70,000 per annual