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This position has closed. Entegris removed this listing from their careers page on Oct 6, 2026. The interview prep below is still useful, and there are similar open roles at the bottom of this page.

Lead Engineer, Chemical Process Engineering

Entegris · Aurora, IL · $114,000–$142,500 a year · Full time

Posted Jul 30, 2026 · We last checked this listing on Oct 5, 2026

Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Walk me through a capital project you led from concept through qualification, validation, and production ramp-up.

What they are checking: Whether they have truly owned the full lifecycle of a major chemical process project, not just pieces of it.

Tell me about a time you mentored a less experienced engineer. How did you help them grow?

What they are checking: Whether they invest in developing others, which this lead role explicitly requires.

Describe a project that improved throughput or reliability. How did you prove the improvement lasted?

What they are checking: Whether they measure sustained results instead of declaring victory right after startup.

What would you do

A new mixing system fails qualification right before planned production ramp. What do you do?

What they are checking: Whether they manage the technical fix and the stakeholder communication calmly under schedule pressure.

When you're backfilling for the Senior Manager, how do you balance operational decisions with your own projects?

What they are checking: Whether they can step into leadership temporarily without dropping their engineering commitments.

About the work

How would you approach bringing a proven process from another Entegris site into the Aurora facility?

What they are checking: Whether they know localization means checking differences in equipment, materials, and people, not just copying documents.

Tell me about your experience designing or troubleshooting PLC and SCADA systems with a controls team.

What they are checking: Whether they have real automation depth to partner with controls engineers on architecture and problems.

How would you justify an automation project to leadership when the payback isn't obvious?

What they are checking: Whether they can build a business case that includes safety, quality, and reliability benefits, not just labor savings.

How do you think about process safety when changing a chemical process?

What they are checking: Whether they use management of change and hazard reviews rather than treating safety as a final checkbox.

How do you work with vendors during equipment design and commissioning to avoid surprises?

What they are checking: Whether they manage vendor relationships with clear specs, reviews, and acceptance testing.

Practice this interview out loud.

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The full job description

As published by Entegris.

Job Title: Lead Engineer, Chemical Process Engineering Job Description: The Role Entegris is currently seeking a Lead Manufacturing Engineer – Chemical Process Engineering to join our Manufacturing Engineering team. This position will be based in our Aurora, Illinois facility. In this role, you will lead high-impact chemical process engineering, industrial automation, and SCADA initiatives that improve safety, quality, throughput, and operational reliability. You will drive major capital projects, localize proven solutions from other Entegris sites, mentor and develop manufacturing engineering talent, and serve as an operational leadership backfill to the Senior Manager when needed. What You’ll Do • Lead major process improvement and capital projects from concept and equipment design through process flow verification, qualification, validation, and production ramp-up. • Drive localization of proven manufacturing processes, products, equipment, and automation solutions from other Entegris sites into the Aurora facility. • Lead automation projects from proposal and justification through vendor engagement, capital execution, commissioning, and sustained operational performance. • Design, qualify, troubleshoot, and support PLC and SCADA architectures in partnership with controls engineering, including backup support for site control systems. • Apply robust Management of Change practices to ensure process and equipment changes are evaluated, documented, implemented, and sustained in compliance with safety and quality requirements. • Mentor, coach, and develop manufacturing engineers by providing technical guidance, feedback, and opportunities to build leadership depth across the team. • Provide operational leadership in the Senior Manager’s absence by keeping critical initiatives moving and serving as a trusted point of contact for Operations, Quality, Maintenance, and cross-functional partners. What We Seek • Bachelor's degree in chemical engineering , or related field. • 5–10 years of hands-on experience in process engineering or manufacturing engineering, preferably in a high-tech manufacturing or industrial environment. • Proven ownership of capital projects, including scope development, budget management, vendor coordination, installation, validation, and production handoff. • Strong project management capability, including schedule ownership, risk mitigation, cross-functional alignment, and contractor or supplier management. • Working knowledge of Management of Change practices and the ability to apply structured change control in a manufacturing environment. • Strong automation fundamentals with experience or exposure to PLC, SCADA, HMI, or batch process control systems; GE Proficy iFIX, ISA S88, or advanced PLC programming experience is a plus. • Demonstrated ability to mentor engineers, influence cross-functional teams, and operate as part of a leadership pipeline; advanced degree, PMP, Six Sigma, or formal leadership development experience is preferred. Why Work at Entegris Lead. Inspire. Innovate. Define Your Future. Not everyone who works for a global company shares the same background, experiences and perspectives. We leverage the differences of our employees to bring new ideas to the table. Every employee throughout the company is encouraged to share input on projects and initiatives. Our decision-making process is truly a collaborative effort as we realize there are leaders at every level of the organization. We put our values at the core of how we operate as an organization — not just when it’s convenient, but in a lasting and meaningful way. We want the time and energy you spend here to have a positive impact on your life inside and outside of the office. What We Offer 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. • Compensation: $114,000 - $142,500 per year range with actual pay dependent on candidate overall skills for the role • Annual bonus eligibility • Generous 401(K) plan with an impressive employer match with no delayed vesting • Excellent health, dental and vision insurance packages to fit your needs • Education assistance to support your learning journey • A values-driven culture with colleagues that rally around People, Accountability, Creativity and Excellence Entegris does not provide immigration-related sponsorship for this role. Do not apply for this role if you will need Entegris immigration sponsorship (e.g., H1B, TN, STEM OPT, etc.) now or in the future. At Entegris we are committed to providing equal opportunity to all employees and applicants. Our policy is to recruit, hire, train, and reward employees for their individual abilities, achievements, and experience without regard to race, color, religion, sexual orientation, age, national origin, disability, marital or military status.