Buffalo Grove, IL
Process Engineer jobs in Buffalo Grove, IL
4 open roles from 2 employers. Checked Oct 6, 2026.
What these openings look like
2 employers are hiring here: Plexus and Flex. 3 of the 4 publish a pay range, running $64,200 to $105,800 a year. The rest do not say. Every posting is full time. The most recent went up on Oct 1, 2026.
Every listing links to the employer's own application. Nothing is posted here on their behalf, and nothing is reposted from anywhere else.
Open roles
What it pays here
Only some employers publish a range. These are the ones that did, as written in their own postings:
- $64,200–$96,200 a year
- $70,600–$105,800 a year
What they ask process engineer candidates here
Drawn from the 4 open postings on this page. The ones that come up across several employers are near the top.
Which manufacturing processes have you owned, like SMT, reflow, wave solder or conformal coat?
What they are checking: Whether they have real process ownership in electronics manufacturing, not just general engineering.
How would you develop a reflow profile for a new board with a mix of large and small components?
What they are checking: Whether they understand thermal mass, paste requirements and how to verify a profile with data.
Solder paste defects are climbing on one SMT line. Walk me through how you would find the cause.
What they are checking: Whether they troubleshoot systematically across stencil, paste, printer and board instead of guessing.
How have you used design of experiments or statistical process control to improve a process?
What they are checking: Whether they use data and statistics to set and hold process windows.
How do you write a PFMEA, and how do you keep it useful after the first draft?
What they are checking: Whether they treat risk analysis as a living tool that guides controls, not a one-time document.
Tell me about a process change you validated for a medical or aerospace customer. What did validation require?
What they are checking: Whether they understand that changes in regulated work need evidence and customer approval.
How do you decide between fixing a process issue and asking the customer to change the design?
What they are checking: Whether they can judge where the root cause lives and push back on design when needed.
Production wants to run a new product before the process is fully proven. How do you handle it?
What they are checking: Whether they can balance schedule pressure against the risk of building bad product.
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