# Thermal Systems Simulation Engineer

> Diversified Services Network, Inc. · Mossville, United States · Full-time · Posted 2026-06-18

**Salary:** USD 65,000–70,000

**Workplace:** on_site

## Description

**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! [https://www.dsnworldwide.com](https://www.dsnworldwide.com)

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

## Apply

[Apply at Diversified Services Network, Inc.](https://apply.workable.com/dsn/j/D32F83C80E/apply)

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