Jobs at Mariana Minerals

Serve as a strategic HR business partner and hands-on generalist supporting the full employee lifecycle. Advise leaders on compensation, performance, organizational design, and workforce planning. Manage HR operations (onboarding/offboarding, HRIS, policy, compliance), coach on employee relations and investigations, drive engagement programs, analyze workforce data, and help scale people programs to support growth and a high-performing culture.

The Process Engineer will oversee bioleaching columns and pilot-scale equipment, bridging R&D and operations to optimize processes for commercial mining.

Serve as a strategic HR Business Partner and hands-on generalist: advise leaders on compensation, performance, org design, and workforce planning; manage onboarding/offboarding and HRIS administration; coach on employee relations and investigations; drive engagement and talent development; analyze workforce data and scale HR processes.

The role involves automating drilling programs, enhancing workflows, and collaborating with software teams to optimize mineral exploration and drilling processes.

The RC Driller Assistant helps in reverse circulation drilling by setting up equipment, collecting samples, performing maintenance, and ensuring safety during operations.

Design, test, and optimize mineral processing flowsheets; lead lab, pilot, and plant trials; analyze metallurgical data to improve recovery and efficiency; collaborate on process scale-up and integrate ML-driven analytics; support commissioning and ramp-up with significant site travel.

Lead design, deployment, and operation of pilot-scale mineral refining processes; design experiments, create/process engineering documentation (PFDs, P&IDs, HMBs), manage equipment design and commissioning, troubleshoot and optimize operations, and collaborate with software/ML teams to implement reactor and plant optimization algorithms while ensuring safety and scalability to commercial production.

Own end-to-end pre-operational procurement for new projects and sites: define specs with engineering, run RFQs, qualify vendors, negotiate contracts, execute purchases, manage first deliveries, consolidate sourcing for volume savings, and transition vendor relationships to on-site procurement.

The Project Engineering Manager leads engineering teams, manages project workflows, coordinates reviews, and ensures timely deliverables for critical minerals supply chain projects.

Lead the planning and design for greenfield mining projects, including site selection, feasibility studies, and civil works design. Collaborate with multiple teams for optimal site infrastructure design and manage external engineering partners.

Lead the development of high-temperature refining systems, design and validate thermal process flowsheets, optimize metal recovery and energy efficiency, and collaborate with R&D teams for process automation.

Lead the development and deployment of chemical refining processes, oversee controls programming, manage equipment and teams, and support project execution and business development.

Design, prototype, and validate electromechanical and robotic hardware for autonomous mining vehicles, including drive-by-wire actuation, motion and powertrain systems, manipulators, and end-effectors. Produce CAD, BOMs, select components, lead bench and field testing, and collaborate with controls and autonomy teams to integrate hardware, sensing, and compute for fully autonomous operation.

The Drill and Blast Engineer will design, execute, and optimize drilling and blasting operations at a copper site, ensuring safety and regulatory compliance.

As a Metallurgy Lead, you'll optimize metallurgical processes, design test programs, track performance, collaborate with teams, and promote safety compliance.

The Staff Process Engineer will lead process design and operation for pilot plants, focusing on mineral processing and technology scale-up. Responsibilities include equipment design, pilot-scale experiments, and process optimization while ensuring safety and compliance.

The RC Driller operates drilling rigs for mineral exploration, ensuring safe operations, high-quality sample recovery, and adherence to safety standards in remote environments.

Lead end-to-end execution of Mariana's capital project programs from development through construction, owning schedules, budgets, risk management, and cross-functional coordination. Manage and grow a team of Technical Program Managers, drive deployment of capital-project software tools, standardize project development and execution, and partner with finance and business development on capital allocation and project economics.

Design, implement, and validate autonomy software for mining vehicles including perception, localization, mapping, motion planning, and control. Integrate and calibrate LiDAR, camera, radar, IMU/GNSS sensors; build embedded real-time software; develop simulation and data pipelines; and lead bench, rig, and field validation while collaborating with hardware and controls teams.

The Staff Product Manager will own a product domain at Mariana Minerals, focusing on software development for physical systems in mining and minerals processing, requires significant on-site experience and cross-functional leadership.