OptiTalent · Job Finder
Jobs in United States
94 open roles read nightly from companies’ own hiring pages. Each one links to the original ad.
61–80 of 94 jobs
Business Operations Manager
6 weeks agoMariana Minerals · Houston, Texas, United States
On-siteFull-timeManagerOperationsMariana Minerals is looking for a Business Operations Manager to lead operational strategy and business performance management for its Lithium business, based out of Mariana's Houston or San Francisco office. This role sits at the intersection of Finance, Business Development…
Sr./Staff Architect
7 weeks agoMariana Minerals · San Francisco, California, United States +1
On-siteFull-timeLead / staff$130K – $200K a yearTrades & logisticsMariana Minerals is looking for an architect to work on building the critical minerals supply chain.
Mariana Minerals · San Francisco, California, United States
On-siteFull-timeLead / staff$180K – $210K a yearEngineeringWe're hiring a Staff Product Manager to own the Engineering and Super domains of CapitalProjectOS (CPOS), the operating system for how Mariana designs, plans, and builds capital projects. CPOS is organized around four components ( MarianaEngineer (design), MarianaGSM…
Sr. Environmental Engineer
7 weeks agoMariana Minerals · San Francisco, California, United States +2
On-siteFull-timeSenior$100K – $150K a yearEngineeringMariana Minerals is hiring a Sr. Environmental Engineer to provide technical environmental engineering support across our U.S. mining, processing, and refining project sites in a fast-paced, multi-project environment. Reporting to the Global Environmental Permitting Lead, you…
Sr./Staff Process Controls Engineer
7 weeks agoMariana Minerals · Houston, Texas, United States +3
On-siteFull-timeLead / staff$150K – $200K a yearEngineeringMariana Minerals is looking for a highly motivated Process Controls Engineer to work on building the critical minerals supply chain.
Custodian/General Labor
7 weeks agoMariana Minerals · Moab, Utah, United States
On-siteFull-timeOperationsWe are seeking a dependable and self-motivated Custodian / General Laborer to support the cleanliness, maintenance, and overall functionality of all site buildings and grounds. This role is essential to creating and maintaining safe, organized, and professional workspaces…
Vice President of Finance
7 weeks agoMariana Minerals · Houston, Texas, United States
On-siteFull-timeExecutiveFinanceWe are seeking an experienced Vice President of Finance to lead and scale Mariana Minerals' existing Accounting and FP&A team as we grow from two capital-intensive flagship projects today toward a broader portfolio of commercial mining and mineral-processing operations.…
R&D Metallurgist
8 weeks agoMariana Minerals · San Francisco, California, United States
On-siteFull-time$110K – $140K a yearEngineeringThe R&D Metallurgist designs, executes, and analyzes experiments to advance Mariana Minerals' hydrometallurgical testing programs. This hands-on laboratory and pilot-scale role focuses on running DOE protocols, operating tank reactors and mining systems, and analyzing data to…
Staff Process Controls Engineer
2 months agoMariana Minerals · San Francisco, California, United States +3
On-siteFull-timeLead / staff$150K – $200K a yearEngineeringMariana Minerals is looking for a highly motivated Controls Engineer to work on building the critical minerals supply chain.
Sr./Staff Technical Program Manager - Copper
2 months agoMariana Minerals · Moab, Utah, United States
On-siteFull-timeLead / staffOperationsWe are hiring Technical Program Managers to own the planning, coordination, and execution of capital projects in Mariana’s portfolio, from idea, to development, through construction and handover to operations.
Full Stack Software Engineer
2 months agoMariana Minerals · San Francisco, California, United States +2
On-siteFull-time$80K – $160K a yearEngineeringMariana Minerals is looking for a highly motivated Full Stack Software Engineer to work on building the critical minerals supply chain to support the world’s energy transition.
Lead Operator
2 months agoMariana Minerals · Joaquin, Texas, United States
On-siteFull-timeLead / staffTrades & logisticsWe are looking for an Operator Lead to oversee shift-level plant operations at our Joaquin, TX facility, directing a small crew of operators through daily production activities while monitoring and controlling process equipment to meet quality, safety, and production targets.…
Process Engineer
2 months agoMariana Minerals · Joaquin, Texas, United States
On-siteFull-timeMid levelEngineeringWe are looking for a Senior Process Engineer to work with our innovative, fast-paced multidisciplinary team. They will be responsible for liaising between R&D and operations, with a focus on chemical process development, successful scale-up of new product execution, and…
Machine Learning Engineer (Autonomy)
2 months agoMariana Minerals · San Francisco, California, United States +2
HybridFull-time$140K – $180K a yearData & AIWe are hiring Machine Learning Engineers (Autonomy) to build the autonomy and sensor-integration software that lets our fixed and mobile equipment perceive, decide, and drive themselves.
Sr. Procurement Specialist - Process Equipment
2 months agoMariana Minerals · San Francisco, California, United States +1
On-siteFull-timeSenior$90K – $126K a yearFinanceMariana Minerals seeks a hands-on, commercially savvy Sr. Procurement Specialist – Process Equipment to drive capital project delivery by overseeing end-to-end procurement of capital equipment. This role isn’t about transactional purchasing—here, you’ll manage defined…
Extractive Metallurgist
2 months agoMariana Minerals · Moab, Utah, United States
On-siteFull-time$100K – $160K a yearEngineeringWe are seeking an Extractive Metallurgist to join our growing technical team in Moab, UT. This role will play a critical part in the development, optimization, and scale-up of mineral processing systems for Mariana’s global operations. The ideal candidate brings strong process…
Staff Product Designer, MarianaOS
2 months agoMariana Minerals · San Francisco, California, United States
On-siteFull-timeLead / staff$180K – $210K a yearDesignTake complex, data-dense workflows in MarianaOS and design clear, usable information architecture and flows ensuring MarianaOS is easy and fast to use for the 100s of employees here that rely on MarianaOS daily to do their complex jobs.; Grow and own our design system,…
Sr. Estimator
3 months agoMariana Minerals · Houston, Texas, United States
On-siteFull-timeSeniorTrades & logisticsMariana Minerals is seeking an experienced and detail-oriented Sr. Estimator to lead cost estimation efforts for mining and mineral processing projects. This role is responsible for developing accurate, competitive, and timely cost estimates that support strategic…
Director of Mining and Technical Services
3 months agoMariana Minerals · Moab, Utah, United States
On-siteFull-timeDirectorOperationsThis position is based out of Moab, UT and the candidate should be local or willing to relocate.
Procurement Manager, Chemicals & Fuels
3 months agoMariana Minerals · San Francisco, California, United States +1
On-siteFull-timeManager$150K – $170K a yearFinanceMariana 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…
Updated 07 Nov 2026 10:21 UTC from the OptiTalent job library.