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Maintenance Mechanic

Sanimax · Green Bay, WI · Full time

Posted Sep 17, 2026 · We last checked this listing on Oct 6, 2026

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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 pump you rebuilt. What failed and how did you find it?

What they are checking: Whether they can find root cause on pumps instead of just swapping parts until it runs.

The schedule is 12-hour shifts on a 2-2-3 rotation. How have you handled long shifts before?

What they are checking: Whether they can keep up quality and safety at the end of a 12-hour shift.

Part of the job is cleaning the plant and shop areas. How do you feel about that?

What they are checking: Whether they accept housekeeping as part of maintenance rather than seeing it as beneath them.

What would you do

You are asked to do hot work near an area with grease and fat buildup. What do you do?

What they are checking: Whether they insist on a hot work permit, fire watch and cleanup first, given how flammable rendering residue is.

It is 3 AM on a night shift, a critical line is down and you are the only mechanic on. How do you decide what to do first?

What they are checking: Whether they can work through a breakdown calmly alone and know when to call someone in.

You work alongside electricians mounting motors and gear drives. How do you divide the work so nobody gets hurt?

What they are checking: Whether they respect trade boundaries and coordinate lockout and alignment with the electrician.

About the work

Tell me about your welding and cutting experience on steel, stainless and aluminum. Which processes are you strongest in?

What they are checking: Whether they can weld all three metals the posting names, since aluminum and stainless take different skills than mild steel.

Walk me through how you lock out a pump before you pull it for a rebuild.

What they are checking: Whether they know a full lockout tagout sequence, including verifying zero energy, not just hanging a lock.

What do you check before you go into a confined space like a tank or a pit?

What they are checking: Whether they understand permits, air testing, an attendant and rescue plans, which keep people alive in a rendering plant.

How do you rig and move a heavy gear drive when you are working in a tight space?

What they are checking: Whether they plan lifts with the right rigging, check weights and keep people out of the load path.

What experience do you have with wastewater, air or boiler systems?

What they are checking: Whether they can help keep the plant's utility systems running, which the posting lists alongside production equipment.

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The full job description

As published by Sanimax.

Your professional transformation starts here Do you enjoy solving technical challenges every day, especially when it comes to building a greener future? Is your independence a priority? Looking for an employer who believes in supporting your professional development? This job is for you! Sanimax is seeking a Maintenance Mechanic to join our Green Bay Team for the day shift and night shift. The schedule is a 2/2/3 working 6 am to 6:20 pm (for day shift) or 6 pm to 6:20 am (for the night shift) Why join Sanimax? • Offer continuous education • Full benefits to include Health, Dental and a matching 401K up to 5% • 3% Quarterly Bonus • Green company with 85+ years of established growth and stability • Predictable schedule • Uniforms and PPE provided Responsibilities: • Perform welding and cutting on steel, stainless steel and aluminum • Must understand safe work practices including: lock out tag out, confined space entry, ladder and climbing safety, hot work permits • Repair pipefitting and plumbing • Assist electricians with mounting and unmounting motors and gear drives • Repair, rebuild and replace pumps • Perform general cleaning within the production plant at times as well as all maintenance areas on a regular basis • Lift, move and rig heavy/awkward equipment and work in tight spaces • Repair, maintain and assist in the operations of waste water, air pollution systems and blending /grain silos • Interact with others in a professional and ethical manner • Follow department and company procedures • Keep up regular attendance, regular attendance is essential for the smooth operation of this company and department success • Other duties as assigned Experience • Experience working on industrial/manufacturing equipment • Ability to weld with wire and stick • Read, understand and work from blue prints and schematics About Sanimax Sanimax reclaims used cooking oil, meat & organic by-products from the agri-food industry, then transform them into industrial ingredients that will be used to manufacture everyday items. Sanimax has been in business 85 years and our mission is to reclaim, renew and return for a greener future. Give meaning to your career and help us make a difference: become a transformation champion! Follow us on LinkedIn Thank you for your interest in joining our team. Please note that we will only contact those whose applications are being considered. At Sanimax, we see strength in diversity, and we are proud to be an equal opportunity employer

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