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Process Engineer

Mariana Minerals

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In brief

Mariana Minerals is hiring: Process Engineer in the US.

Duties

  • Process ownership – SX and EW
  • Act as the engineering owner of the SX and EW circuits, including mixer-settlers, organic and electrolyte handling, tank house, cell house and…
  • Monitor daily plant performance (PLS grade and flow, extraction and stripping efficiency, phase continuity, entrainment, current efficiency, cathode…
  • Define and maintain operating envelopes, control set points and alarm limits together with operations and control engineers.
  • Lead technical troubleshooting of process upsets such as crud formation, organic degradation, impurity build-up (Fe, Mn, Cl, NO₃), short circuits…

Excerpt from the ad

ABOUT MARIANA MINERALS Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining…

Source: ad by Mariana Minerals, published on Careers pages (ATS). MakeYouFirst summarises this ad; the advertiser remains responsible for its content.

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FAQ

Frequently asked questions

Where is the job based?

The job is based in the US (United States).

How do I apply for this job?

Click “Apply now”: with your free MakeYouFirst account, your CV and cover letter are tailored to this job, the recruiter’s email is found for you and the application is sent from your own mailbox once you approve it.

What skills do methods engineer jobs require?

Manufacturing employers look for people who are rigorous, careful about safety and quality, and good in a team. Machine operation, production software and quality procedures come up often in the ads.

Do methods engineer jobs involve shift work?

Often: many sites run two or three shifts, sometimes with nights and weekends. Shift and night premiums then increase your pay; the ad usually states the shift pattern.

Listing published by Youssef Douiri, founder of MakeYouFirst · Updated on 8 November 2026

MakeYouFirst — a Global Digital Agency product