Mariana Minerals is seeking a Sr. Estimator to lead cost estimation for mining and mineral processing projects. The role involves developing accurate cost estimates, analyzing drawings, collaborating with teams, and mentoring junior estimators.
Mariana Minerals is seeking a Staff Mechanical Engineer to lead design, integration, and deployment of pilot-scale mechanical systems for a critical minerals processing pilot plant in Houston. The role involves hands-on work with process engineers, equipment design, installation, and reliability improvement.
Mariana Minerals is hiring a Structural Steel Designer to configure and lead structural steel drafting and modeling for capital projects, from conceptual engineering through detailed design. The role involves developing 3D models, generating drawings, and establishing best practices in Tekla.
Mariana Minerals is hiring a Sr. HR Generalist/Business Partner to serve as a trusted advisor to business leaders, balancing strategic HR partnership with hands-on HR operations across the employee lifecycle. The role involves employee relations, performance management, onboarding, HRIS administration, and scaling people programs in a startup environment.
Mariana Minerals seeks a Senior Data Engineer to own data domains end-to-end, building pipelines and schemas that make plant data trustworthy for ML and operations. You'll design the data backbone for autonomous mineral refining.
Mariana Minerals is seeking a Machine Learning Engineer to build and improve ML systems that control mineral refining facilities, using reinforcement learning in simulators and real plants to optimize recovery, energy, and uptime.
Mariana Minerals is a software-first minerals company building autonomous refining operations. We're hiring a Staff Machine Learning Engineer to set technical direction for control models and tackle the hardest modeling problems in the mining industry.
Mariana Minerals is seeking a Piping Design Engineer to lead piping design from concept to construction drawings, using AutoCAD Plant 3D, and collaborate with cross-functional teams. This is a contract role based in San Francisco.
Mariana Minerals is seeking a Pilot Plant Technician to support the design, deployment, and operation of refining processes for critical minerals. The role involves hands-on operation of chemical processes, equipment maintenance, and documentation, working a weekend shift (Fri-Mon, 6AM-4PM).
Mariana Minerals is seeking a Metallurgical Engineer to support process development and pilot-scale testing for its CopperOne mine pilot facility. The role involves executing metallurgical test work, operating pilot plant equipment, and collaborating with R&D and cross-functional teams to optimize mineral processing technologies.
Support the design, deployment, and operation of first-of-its-kind refining processes for critical minerals as a Pilot Plant Technician at Mariana Minerals in San Francisco. Hands-on role bridging R&D and Operations, involving chemical process operation, safety, and maintenance.
Mariana Minerals is seeking a Warehouse & Logistics Coordinator to oversee shipping & receiving, maintain warehouse operations, and build logistics programs for its San Francisco Pilot Plant. The role bridges R&D and Operations, ensuring facilities are robust, safe, and cost-effective.
Mariana Minerals seeks a Head of Engineering Programs to lead capital project programs from development through construction, driving schedules, budgets, and cross-functional execution. The role includes leading a team of Technical Program Managers and supporting the deployment of the capital-project operating system.
Mariana Minerals is hiring a Mechatronics Engineer (Hardware) to design and build actuation, automation, and robotic hardware for autonomous mining vehicles. The role involves owning electromechanical systems, from concept to validation, and collaborating with controls and autonomy teams.
Mariana Minerals is hiring a Recruiting Coordinator & Rec Ops Specialist to support and scale hiring operations, manage scheduling, candidate communications, and improve recruiting processes in Ashby. This role requires 2-5+ years of experience in recruiting coordination or talent ops.
Mariana Minerals is seeking a Mechanical Engineer to lead development and deployment of first-of-its-kind chemical refining processes, design and commission mineral processing equipment, and support software for plant optimization. This hands-on role involves leading equipment scopes from concept to handover, with a focus on building the critical minerals supply chain for the energy transition.
Mariana Minerals is hiring a Staff Product Manager to own a critical domain within MarianaOS, the digital nervous system for mineral projects. This on-site role involves leading product development across mining and refining operations, with significant travel, and requires 7+ years of PM experience in physical systems.
Mariana Minerals is hiring a Senior Technical Sourcer to build world-class engineering and technical teams. The role involves developing sourcing strategies, engaging passive candidates, and partnering with recruiters and hiring managers to attract exceptional talent for a software-first minerals company.
Mariana Minerals seeks a Mechanical Maintenance Technician to support design, installation, and maintenance of refining processes for critical minerals. The role involves preventive/corrective maintenance, troubleshooting, and fabrication, bridging R&D and Operations.
Mariana Minerals is hiring a Global Workplace Director to lead workplace strategy, facilities operations, and office expansion across global locations. The role involves developing workplace standards, managing budgets, and building a high-performing team to support company growth.
