OptiTalent · Job Finder
Jobs at Mariana Minerals
96 open roles read nightly from companies’ own hiring pages. Each one links to the original ad.
21–40 of 96 jobs
Document Control Coordinator
2 weeks agoMariana Minerals · Houston, Texas, United States +1
On-siteFull-timeMid level$76K – $115K a yearAdministrationMariana Minerals is looking for an EPC Document Control Coordinator
Site Superintendent
2 weeks agoMariana Minerals · Houston, Texas, United States
On-siteFull-timeTrades & logisticsAs Site Superintendent, you will be responsible for the entire build of industrial process infrastructure, from site development and ground-up civil work through installation and startup. You’ll schedule and direct trade contractors, run daily coordination meetings, resolve…
Mariana Minerals · San Francisco, California, United States +1
On-siteFull-time$85K – $100K a yearScience & researchTravel to Mariana Minerals lab sites to troubleshoot and resolve issues with analytical techniques, instruments, data quality and method performance; Help bring new lab systems online and integrated at new sites, starting with Lithium One; Implement, program and maintain…
Fabrication Technician
2 weeks agoMariana Minerals · San Francisco, California, United States
On-siteFull-timeMid level$45.00 – $55.00 an hourTrades & logisticsMariana Minerals is looking for a highly motivated Fabrication Technician to join our San Francisco Pilot Plant team. You will support the design, installation, and maintenance of first-of-its-kind refining processes for critical minerals. As part of a growing maintenance team,…
Analytical Lab Chemist
2 weeks agoMariana Minerals · Moab, Utah, United States
On-siteFull-timeScience & researchJoin our analytical lab at Copper One as an Associate Analytical Chemist. You’ll run sample prep and analytical testing on state-of-the-art equipment in a newly renovated lab, keep data accurate and instruments performing at their best, and dig into problems that don’t come…
Process Plant Technician
2 weeks agoMariana Minerals · Moab, Utah, United States
On-siteFull-timeTrades & logisticsThe Process Plant Technician is a position in the operation of SX/EW plant and tank house. Where in, the Process Plant Technician obtains and demonstrates knowledge of the process plant operation parameters and operating procedures. The Process Plant Technician supports and…
Project Maintenance Technician
2 weeks agoMariana Minerals · Moab, Utah, United States
On-siteFull-timeOperationsWe are hiring a Maintenance Mechanic for our new project team at our Moab site, formerly Lisbon Mines, to assemble and install equipment for new projects.
Project Engineer
2 weeks agoMariana Minerals · Moab, Utah, United States
On-siteFull-timeMid levelEngineeringScope, design, and lead process improvement and capital projects from concept through commissioning; Develop process flow diagrams, P&IDs, mass and energy balances, and equipment specifications; Size and select pumps, tanks, piping, and other process equipment; Use plant data…
BIM Design Engineer
3 weeks agoMariana Minerals · Houston, Texas, United States +1
On-siteFull-time$100K – $140K a yearEngineeringMariana 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 the minerals supply chain by combining deep industry expertise with advanced…
IP Counsel
3 weeks agoMariana Minerals · San Francisco, California, United States
On-siteFull-timeSenior$130K – $185K a yearLegal & complianceWe are looking for an experienced and motivated Intellectual Property Counsel to join our growing legal team. This is a hands-on, generalist IP role for an attorney who wants to own the full range of intellectual property issues at a company building first-of-a-kind technology.…
Commercial Counsel
3 weeks agoMariana Minerals · San Francisco, California, United States
On-siteFull-timeSenior$130K – $185K a yearLegal & complianceWe are looking for an experienced and motivated Commercial Counsel to join our growing legal team, with a focus on M&A and commercial transactions. This is a hands-on, deal-focused role for a transactional attorney who thrives in an operational environment. You will report to…
Production Planner
3 weeks agoMariana Minerals · Houston, Texas, United States +1
HybridFull-timeSeniorOperationsPartner with site leads to build, refine, and maintain site-level production plans; Consolidate production plans across all locations into a unified, company-wide view; Define, track, and report KPIs covering productivity, cycle times, and costs; Build planning tools and…
Mariana Minerals · Houston, Texas, United States
On-siteFull-timeLead / staffEngineeringWe are hiring a Senior / Staff Process Engineer to execute detailed engineering deliverables such as P&IDs, line and instrument and valve lists, control narratives, hydraulic models, equipment and bulk specifications, and the procurement packages behind them. Mariana executes…
Sr. Technical Recruiter
3 weeks agoMariana Minerals · San Francisco, California, United States
On-siteFull-timeSenior$100K – $175K a yearPeople & HRDevelop and execute sourcing strategies for highly technical roles across teams; Build targeted searches that identify exceptional technical talent across multiple industries and research communities; Research, identify, and engage passive candidates through highly personalized…
Logistics Analyst
3 weeks agoMariana Minerals · San Francisco, California, United States
On-siteFull-timeMid level$85K – $120K a yearOperationsMariana is hiring a Logistics Analyst to own the operational logistics intelligence that keeps our procurement, engineering, and site teams making well-informed decisions about how we move materials and equipment.
Plant Design Manager
3 weeks agoMariana Minerals · Houston, Texas, United States +1
On-siteFull-timeManager$140K – $190K a yearDesignMariana Minerals is looking for an experienced Plant Design Manager to lead our design and Building Information Management (BIM) teams.
Pilot Plant Operations Manager
3 weeks agoMariana Minerals · Houston, Texas, United States
On-siteFull-timeManagerOperationsMariana Minerals is looking for an experienced Pilot Plant Operations Manager to lead operations at our DSM Pilot Plant in Houston. The DSM pilot is a first-of-its-kind, fully integrated flowsheet that couples a high temperature pyrometallurgical section with a downstream…
Logistics Manager
3 weeks agoMariana Minerals · San Francisco, California, United States
On-siteFull-time$130K – $190K a yearOperationsMariana is hiring a Logistics Manager to build and lead our logistics function as we scale operations across multiple sites and projects. This is both a leadership and a hands-on role. You will set the strategy, manage the team, own our relationships with 3PL partners and…
Senior Safety Engineer
3 weeks agoMariana Minerals · Houston, Texas, United States
On-siteFull-timeSeniorEngineeringWe are hiring a Senior Safety Engineer to lead ISO 45001 implementation and help our teams solve safety challenges in equipment and facility design. You will establish the system at an initial site, build company policies and procedures that other locations can use, and support…
Sr. Piping Designer
3 weeks agoMariana Minerals · Houston, Texas, United States
On-siteFull-timeSeniorDesignWe are hiring Piping Design Engineers to rebuild how piping design is done.
Updated 06 Nov 2026 09:37 UTC from the OptiTalent job library.