Process Engineer

Mariana 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 software, automation, and data-driven decision-making.

Position Summary:

We 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 sustaining technology-manufacturing readiness. This person must be flexible, proactive, and professional with experience in scale-up and process development applications such as chemical refining, hydrometallurgy, minerals, and chemical processing.

Key Responsibilities:

• Lead the development and scale-up of lab processes on pilot and production scales, with a focus on improving metal recovery and reducing cost and environmental impact.

• Identify potential process risks, and propose, and evaluate solutions to mitigate the risks.

• Evaluate process capability, improve process control, and deliver samples to customers.

• Conduct detailed process simulations and modeling to predict process behaviors under various scenarios.

• Develop, prepare, and provide detailed production and process guidelines, including: standard operating procedures (SOPs), process flow details, safety, and quality standards.

• Improve and troubleshoot products, equipment, and process issues during production.

• Provide technical leadership and mentorship to junior scientists, engineers, and technical staff.

• Guide the R&D team and any external partners in the design and execution of experiments to develop the required base data for chemical process design.

• Drive chemical process design and development from the concept stages to scaled production, ensuring quality is maintained throughout the lifecycle of the project.

• Develop and model potential process designs for scale-up and cost estimating based on lab-scale chemical processes.

• Identify potential process risks, and propose, and evaluate solutions to mitigate the risks.

• Evaluate process capability and improve process control.

Required Qualifications:

• A bachelor’s degree in chemical engineering or a related discipline is required.

• 3-5 years of experience in Chemical Process and/or Development Engineering required.

• Hands-on experience scaling processes from R&D to an operating environment.

• Expertise in process modeling, development, control, and scale-up.

• Coordinate and execute bench-top, pilot, manufacturing scale-up, and verification batches with speed and robustness.

• Proficient in using software for process analysis and modeling.

• Sound understanding of chemical processes and their scale-up.

• Strong leadership and interpersonal skills for implementation of cross-functional process improvements.

• Strong background in analytical & quantitative skills for problem-solving of large/complex problems & proven ability in decision-making

Desired Qualifications:

• Hydrometallurgy experience

• Mining experience

• Battery material experience

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