Sr./Staff Mechanical Engineer is open at Marianaminerals in San Francisco HQ. The posting gives a salary of $140K - $175K. Posted on Oct 7, 2026, and still on Marianaminerals’s careers page when we last checked, on Nov 14, 2026.
About the role
Mariana Minerals is looking for a highly motivated Sr./Staff Mechanical Engineer to work on building the critical minerals supply chain to support the world’s energy transition. As a Mechanical Engineer at Mariana Minerals, you will lead the development and deployment of first-of-its-kind chemical refining processes, while also supporting development of software for project execution and plant optimization. You will…
The opening lines of the posting. The rest is on Marianaminerals’s careers page.
Hiring at Marianaminerals
Marianaminerals has 102 open roles right now. Most are in Engineering, Manufacturing & Trades and Operations. The median advertised salary across its roles with a published range is $160K. See all its roles
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