Performance/Simulation/Application Engineer

Performance/Simulation/Application Engineer Mossville, IL

Job Summary

The Large Power System Division currently seeking a Catalyst Performance/Simulation/Application Engineer who will support the development and application of aftertreatment systems through catalyst sizing, performance simulation, system analysis, and validation. The engineer will use simulation and test data to evaluate catalyst performance, optimize aftertreatment system sizing, and provide technical recommendations supporting product development and application programs.

What you will do:

• Perform catalyst performance modeling and sizing to support aftertreatment applications.
• Evaluate catalyst sizing alternatives and aftertreatment capability across operating conditions.
• Analyze test-cell and field data to assess aftertreatment performance.
• Use simulation results and experimental data to identify performance gaps and recommend technical solutions.
• Support catalyst and aftertreatment system selection, sizing, and application decisions.
• Develop and communicate technical conclusions, assumptions, risks, and recommendations.
• Partner with design, test, controls, application, and program teams to resolve aftertreatment performance issues.
• Support project execution by providing timely analysis, technical direction, and documentation.

Education and Experience:

• Master’s degree in Mechanical Engineering, Chemical Engineering, or a related engineering discipline.
• Hands-on experience performing catalyst sizing and catalyst performance simulation/modeling.
• Demonstrated experience evaluating aftertreatment system capability and catalyst sizing tradeoffs.
• Experience analyzing engineering data and translating simulation or test results into technical recommendations.
• Strong analytical and problem-solving skills.
• Ability to communicate technical findings and recommendations clearly to engineering teams and project stakeholders

Skills you will have:

• Process Management: Understanding and applying business process improvement tools and techniques; ability to understand, monitor, update, control, or enhance existing business or work processes.
• Accuracy and Attention to Detail: Ability to complete tasks with high levels of precision.
• Analytical Thinking: Ability to determine root causes and create alternative solutions.
• Effective Communications: Ability to transmit, receive, and interpret ideas and needs clearly.
• Problem Solving: Knowledge of approaches and tools for recognizing and resolving problems.
• Technical Excellence: Ability to develop and provide solutions to significant technical challenges.
• Project Management: Ability to plan, organize, monitor, and control projects to achieve objectives.
• Computer-Aided Design & Engineering: Ability to produce, analyze, simulate and test product design drafts.

Top Candidates Will Have:

• Experience with diesel or natural-gas engine aftertreatment systems.
• Experience with catalyst technologies and system-level aftertreatment development.
• Experience correlating simulation predictions with laboratory, test-cell, or field results.
• Knowledge of emissions performance, exhaust thermal conditions, conversion efficiency, and catalyst aging/deterioration.
• Experience supporting new-product or application-development programs.
• Familiarity with catalyst canning and DEF system components.
• Ability to work/lead multiple projects simultaneously and to make sound priority decisions.

Additional Information:

• This position is located in Mossville, IL.
• Domestic relocation assistance is available for this position.
• Visa sponsorship is available for this position.

Posting Dates: November 3, 2026 - November 10, 2026

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