Jobs › Flex

Machinist

Flex · Buffalo Grove, IL · Full time

Posted Sep 14, 2026 · We last checked this listing on Oct 6, 2026

Apply at Flex

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

Tell me about a time a part came out of spec. How did you find the cause?

What they are checking: Whether they troubleshoot machine, tool and setup methodically instead of just rerunning.

How do you keep your machine and work area safe and clean?

What they are checking: Whether they follow shop safety habits that protect themselves and keep the machine accurate.

Tell me about a tool, jig or fixture you built from scratch.

What they are checking: Whether they can handle the full range of specialized work this role covers.

What would you do

You are repairing a die or fixture and the drawing is unclear. What do you do?

What they are checking: Whether they ask the Special Tooling Manager or engineer rather than guessing on critical tooling.

A production line is down waiting on a tool you are repairing. How do you handle the pressure?

What they are checking: Whether they work quickly without cutting corners, since a bad repair causes more downtime.

About the work

Tell me about your experience running a CNC grinder.

What they are checking: Whether they have real hands-on grinding experience, since that is the core of this role.

How do you set up a grinding job to hold a tight tolerance?

What they are checking: Whether they understand fixturing, wheel dressing and measurement needed for precision work.

What measuring tools do you use to check your parts?

What they are checking: Whether they are comfortable with micrometers, gauges and indicators to verify work.

How do you read a blueprint with GD and T callouts?

What they are checking: Whether they can interpret drawings well enough to build and repair tools, jigs and fixtures.

How do you know when a tool or instrument needs calibration?

What they are checking: Whether they understand calibration as part of keeping measurements trustworthy.

Practice this interview out loud.

Offer builds a real interview for this exact role at Flex from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

Practice this out loud

The full job description

As published by Flex.

Flex is the diversified manufacturing partner of choice that helps market-leading brands design, build and deliver innovative products that improve the world. A career at Flex offers the opportunity to make a difference and invest in your growth in a respectful, inclusive, and collaborative environment. If you are excited about a role but don't meet every bullet point, we encourage you to apply and join us to create the extraordinary. Job Summary At Flex, we welcome people of all backgrounds. Our employees thrive here by living our values: we support each other as we strive to find a better way, we move fast with discipline and purpose, and we do the right thing always. Through a respectful, inclusive and collaborative culture, a career at Flex offers the opportunity to make a difference, invest in your career growth and join our purpose -- to make great products that create value and improve people’s lives. Job summary: To support our extraordinary teams who build great products and contribute to our growth, we’re looking to add an experienced CNC Mill Machinist located in Buffalo Grove, IL Reporting to the Tooling Manager this role involves performing a variety of complex, specialized tasks related to the construction, repair, maintenance, and calibration of machine shop tools, dies, jigs, fixtures, and instruments. Schedule - Mon- Fri - 6am-2:30pm What a typical day looks like : • Operates multiple CNC milling machines to produce tight tolerance, complex parts. • Perform complex machine set-ups, adjust speeds, feeds, and do basic program editing to ensure that parts are made to the correct specifications and tolerance. • Inspect machined parts against blueprints and 3D models. • Machine and inspect parts within .0002” • Fill out inspection reports accurately. Education/Experience: • High School or GED degree. Experience with Mazak and Mazatrol experience preferred. • Advanced knowledge of CNC milling machines. • Advanced knowledge of modifying speeds and feeds. • Advanced knowledge of milling cutters • Ability to operate multiple machines. • Knowledge of machine editing. • Advanced inspection skills. • Advanced blueprint reading skills. • Ability to interrogate 3D models and blue prints. • Basic Knowledge of injection molds and components. • Intermediate computer skills. • Ability to work independently with very limited supervision. • Able to do preventative maintenance on machines. • Excellent organizational skills. • Accuracy and attention to details are critically important. • Knowledge of Makino, Roders, Mikron, or Mazak machining centers is preferred. What you'll receive for the great work you provide: • Full range of medical, dental, and vision plans • Life Insurance • Short-term and Long-term Disability • Matching 401(k) Contributions • Vacation and Paid Sick Time • Tuition Reimbursement 
 Application Deadline: Applications for this job position will be accepted for at least five days following the job posting start date below and continuing until the end date below or until the position is filled. This posting may close sooner due to application volume. 

 The base pay range for this position is provided below. The final base rate offered will be determined using job-related, non-discriminatory criteria, including but not limited to experience, qualifications, geographic location, education, external market data, and internal equity. $31.04 USD - $42.68 USD Hourly Job Category Operations Is Sponsorship Available? No Flex is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email accessibility@flex.com and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at Flex, you must complete the application process first).

Apply at Flex

More machinist roles