Job Title: Senior Engineer, Mechanical Systems Engineering Job Description: The Role: We are seeking a talented and motivated Senior Mechanical Systems Engineer to join our team, focusing on the development and optimization of gas purification systems. This position is responsible for designing, documenting, analyzing, testing, and collaborating across functions to implement advanced technologies in gas purification systems. This position will report to the Manager, Product Development Engineering.   In this role, the Senior Mechanical Systems Engineer will provide experienced mechanical and system-level engineering support across new product development, product transfer, qualification, production readiness and continuous improvement activities. What You’ll Do: Create and refine mechanical components, assemblies, and sub-systems for UHP gas purification systems. Work cross-functionally to integrate mechanical systems with electrical, controls, software, and other subsystems for complete system integration. Own the sizing and selection of mechanical components to meet system performance, safety, reliability, manufacturability, and compliance requirements. Apply system-level understanding of architecture, P&IDs, gas flow paths, component functions, operating sequences, and subsystem interfaces to guide design decisions and issue resolution. Develop, review, and maintain solid models, engineering drawings, design specifications, BOMs, procedures, and other technical documentation required for product development and manufacturing release. Conduct and document engineering calculations, simulations, and technical analyses to evaluate system performance, reliability, and technical feasibility. Plan and support rigorous testing, validation, qualification, FAT, STP, commissioning, and production build activities to ensure performance, reliability, and compliance with applicable standards. Lead troubleshooting and root cause analysis for complex mechanical, process, test, and system-integration issues, and drive corrective actions to closure. Analyze and optimize purification processes to improve performance and efficiency, reduce energy consumption, and minimize environmental impact. Support product transfer and manufacturing readiness, including design-package reviews, BOM structure, routing readiness, documentation-gap closure, first-build support, and production issue resolution. Prepare and review detailed technical documentation, including engineering drawings, specifications, calculations, test plans, test reports, build records, engineering summaries, and issue trackers. Lead or support design reviews, risk assessments, engineering changes, configuration control, drawing updates, and continuous improvement initiatives. Stay updated with the latest advancements in gas purification technologies and contribute to continuous improvement initiatives.  Any other duties as assigned.   What We Seek: Bachelor’s or master’s degree in mechanical engineering or a related field. 5-8 years of experience preferred in mechanical engineering with a Bachelor’s degree; or 3-6 years of relevant engineering experience with a Master’s degree. Proficiency in SolidWorks CAD software and simulation tools (e.g., SolidWorks Simulation, ANSYS).  Strong knowledge of mechanical systems engineering, component design and selection, fluid dynamics, and system integration. Strong analytical and problem-solving skills, with the ability to troubleshoot complex systems and processes. Hands-on experience troubleshooting mechanical, process, test, or system integration issues during assembly, testing, or commissioning. Excellent verbal and written communication skills, with the ability to convey technical information clearly and concisely. Experience with SAP ERP systems, especially BOMs, routings and documentation. Proficiency in Microsoft Office tools. Ability to work effectively in a collaborative team environment and manage multiple projects simultaneously and advises and mentor less experienced engineers. Ability to prioritize workload, independently manage projects, handle multiple tasks and meet strict deadlines. Detail-oriented with strong problem solving and decision-making skills and the ability to troubleshoot complex systems and processes.  Experience working in a global company with cross-site collaboration. A proactive mindset with a passion for innovation and sustainability. Outstanding Candidates Will Have: Technical Expertise: Deep understanding of mechanical systems engineering principles and purification technologies, with hands-on experience in design and systems optimization, complemented by advanced analytical and simulation capabilities. Advanced understanding of fluid dynamics. Experience with process simulation software. Technical Leadership: Demonstrated ownership of complex engineering work from concept through validation and manufacturing release, with the ability to guide design decisions and mentor less experienced engineers. Product and Manufacturing Readiness: Experience supporting product transfer, first builds, qualification, FAT, commissioning, supplier coordination, and production issue resolution in a regulated or high-purity equipment environment. Key Success Factors: Delivers assigned design, analysis, testing, transfer, and implementation work to project commitments. Produces accurate, complete, and clear engineering documentation that supports design control, manufacturing, and future reference. Demonstrates sound technical ownership by making evidence-based decisions, identifying risks, and driving complex issues to closure. Demonstrates effective teamwork and communication with cross functional teams, global engineering groups and stakeholders while developing capabilities of less experienced engineers. What We Offer: At Entegris, we invest in providing opportunities for our employees and promote from within. The new hire in this role will have the potential to grow and create relationships across the organization and be recognized for demonstrated success and adherence to company PACE values. Our total rewards package goes above and beyond just a paycheck. Whether you’re looking to build your career, improve your health, or protect your wealth, we offer generous benefits to help you achieve your goals. Competitive Contractual and Profit-Sharing Bonuses: Rewarding your hard work and dedication. Comprehensive Health Insurance: Tailored packages to meet your individual needs. Generous Paid Public Holidays: Enjoy 17 days off to celebrate and relax. Empowering PTO Policy: Take the time you need to recharge and come back refreshed. Education Assistance: Support for your continuous learning and development. Values-Driven Culture: Work with colleagues who embody People, Accountability, Creativity and Excellence. At Entegris, we want you to be part of our culture, which values your unique talents, skills, and experiences. We believe what we do is as important as how we do it. People at our company bring their true selves to work, and are appreciated not only for what they do, but for who they are. This plus the technical complexity of our products and solutions means you can be sure your work is both challenging and changing the world for the better. Learn more about why people enjoy working at Entegris.

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