Career Area: Engineering Job Description: Your Work Shapes the World at Caterpillar Inc. When you join Caterpillar, you're joining a global team who cares not just about the work we do – but also about each other. We are the makers, problem solvers, and future world builders who are creating stronger, more sustainable communities. We don't just talk about progress and innovation here – we make it happen, with our customers, where we work and live. Together, we are building a better world, so we can all enjoy living in it. 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; this type of data review is specifically included in your prior requisition. 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 Requirement: Bachelor’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, consistent with responsibilities identified in the existing engineering requisition. 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: Working knowledge of business process improvement tools and techniques; ability to understand, monitor, update, control, or enhance existing business or work processes. Accuracy and Attention to Detail: Working knowledge and understanding the necessity and value of accuracy; ability to complete tasks with high levels of precision. Analytical Thinking: Working knowledge of techniques and tools that promote effective analysis; ability to determine the root cause of organizational problems and create alternative solutions that resolve these problems. Effective Communications: Working knowledge and understanding of effective communication concepts, tools and techniques; ability to effectively transmit, receive, and accurately interpret ideas, information, and needs through the application of appropriate communication behaviors. Problem Solving: Extensive knowledge of approaches, tools, techniques for recognizing, anticipating, and resolving organizational, operational or process problems; ability to apply knowledge of problem solving appropriately to diverse situations. Technical Excellence: Working knowledge of a given technology and various application methods; ability to develop and provide solutions to significant technical challenges. Project Management: Basic knowledge of effective project management strategies and tactics; ability to plan, organize, monitor, and control projects, ensuring efficient utilization of technical and administrative resources to achieve project objectives. Computer-Aided Design & Engineering: Working knowledge of tools and techniques of specialized graphics programs; ability to produce, analyze, simulate and test product design drafts Top Candidates Will Have: Master’s degree in Mechanical Engineering, Chemical Engineering, or a related engineering discipline. 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. Please ensure you frequently sign in to your candidate home for any updates or correspondence for positions that you have applied for. https://cat.wd5.myworkdayjobs.com/CaterpillarCareers. Keep a frequent check on emails as correspondence will be sent to the email that you used to apply with. #LI Summary Pay Range: $97,530.00 - $146,290.00 Compensation and benefits offered may vary depending on multiple individualized factors, job level, market location, job-related knowledge, skills, individual performance and experience. Please note that salary is only one component of total compensation at Caterpillar. Benefits: Subject to plan eligibility, terms, and guidelines. This is a summary list of benefits. Medical, dental, and vision benefits* Paid time off plan (Vacation, Holidays, Volunteer, etc.)* 401(k) savings plans* Health Savings Account (HSA)* Flexible Spending Accounts (FSAs)* Health Lifestyle Programs* Employee Assistance Program* Voluntary Benefits and Employee Discounts* Career Development* Incentive bonus* Disability benefits Life Insurance Parental leave Adoption benefits Tuition Reimbursement * These benefits also apply to part-time employees This position requires working onsite five days a week. Relocation is available for this position. Visa sponsorship is available for eligible applicants. Posting Dates: November 5, 2026 - November 11, 2026 Any offer of employment is conditioned upon the successful completion of a drug screen. Caterpillar is an Equal Opportunity Employer, Including Veterans and Individuals with Disabilities. Qualified applicants of any age are encouraged to apply. Not ready to apply? Join our Talent Community. There’s more to work at Caterpillar than just the work itself. We hire smart, friendly people and it shows in our culture. We hold ourselves to high standards and make sure our values of integrity, excellence, teamwork, commitment and sustainability come to life in the way we work. We make sure our employees feel continuously challenged while also supported. We provide professional growth opportunities, including leadership programs. We celebrate the diversity of our team, while also working together as one Caterpillar. Our culture, like everything at our company, is made possible by each employee’s contribution. Person by person, we create the environment we work in, and we are proud of the Caterpillar we’ve built.

Performance/Simulation/Application Engineer.

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