CFD Simulation Engineer

ALTEN Technology USA • Raymond, OH

10h

About The Position

We’re ALTEN Technology USA, an engineering company helping clients bring groundbreaking ideas to life—from advancing space exploration and life-saving medical devices to building autonomous electric vehicles. With 3,000+ experts across North America, we partner with leading companies in aerospace, medical devices, robotics, automotive, commercial vehicles, EVs, rail, and more.
As part of the global ALTEN Group—57,000+ engineers in 30 countries—we deliver across the entire product development cycle, from consulting to full project outsourcing.
When you join ALTEN Technology USA, you’ll collaborate on some of the world’s toughest engineering challenges, supported by mentorship, career growth opportunities, and comprehensive benefits. We take pride in fostering a culture where employees feel valued, supported, and inspired to grow.
Seeking a highly skilled CFD Simulation Engineer with a strong background in Conjugate Heat Transfer (CHT) analysis.
The ideal candidate will have hands-on expertise in STAR-CCM+, ANSYS Fluent, and OpenFOAM, coupled with solid experience in pre-processing (ANSA) and automation scripting to accelerate simulation workflows.
You will be responsible for developing, executing, and optimizing CFD models to support thermal management, design validation, and performance improvement of complex engineering systems.

Requirements

• Bachelor’s or Master’s degree in Mechanical, Aerospace Engineering or related field.
• 3+ years of hands-on experience in CFD simulations, particularly CHT and thermal-fluid coupling.
• Proficiency in STAR-CCM+, working knowledge of ANSYS Fluent and OpenFOAM preferred.
• Strong experience with ANSA for geometry preparation and mesh generation, working knowledge of CATIA preferred.
• Familiarity with computational method for modeling heat transfer – radiation, conduction and convection. Experience in CFD modeling building focused on heat transfer mechanisms preferably automotive application.
• Experience with Python, Bash, or Java macros for CFD process automation.
• Understanding HPC environments, parallel computing, and GPU acceleration (HPC clusters, NVIDIA A100/H100) is a plus.

Nice To Haves

• Experience with parametric studies, DOE, and optimization frameworks .
• Familiarity with CAD tools (CATIA, SolidWorks) for model import/export.
• Knowledge of data visualization tools (ParaView, Ensight or Tecplot, ).
• Strong analytical mindset and ability to communicate technical insights effectively.

Responsibilities

• Develop and execute CHT and thermal-fluid CFD simulations for full-system models.
• Perform geometry cleanup, meshing, and surface preparation using ANSA and STAR-CCM+
• Build, calibrate, and validate CFD models using experimental or reference data.
• Run simulations in STAR-CCM+, Fluent, and OpenFOAM, ensuring model accuracy and computational efficiency.
• Conduct parametric, design optimization, and sensitivity studies.
• Develop automation and scripting tools (e.g., Python, Java, or macro scripting) to streamline model setup and post-processing workflows.
• Collaborate with design, test, and system integration teams to interpret results and provide actionable insights.
• Document methodologies, simulation plans, and validation results clearly and concisely.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level