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Trainee Minerals Processing Engineer Jobs in Texas

Mariana Minerals

Staff Process Engineer

Houston, TX · On-site

$140K - $175K/yr

... minerals processing pilot plant in Houston. You will help design, deploy, and operate first-of-its-kind refining processes for critical minerals. This role is highly hands-on and will play a key role ...

Mariana Minerals

Staff Mechanical Engineer

Houston, TX · On-site

$140K - $175K/yr

The Role Mariana Minerals is seeking a highly motivated Staff Mechanical Engineer to support our next-generation minerals processing pilot plant in Houston. You will lead the design, integration, and ...

Mariana Minerals

Head of Engineering Programs

Houston, TX · On-site

$180K - $240K/yr

Bachelor's degree in Engineering or a related technical field * 10+ years of experience leading program or project management for large, complex capital projects in mining, minerals processing ...

Mariana Minerals

Sr. Electrical Engineer

Houston, TX · On-site

$140K - $210K/yr

... mineral processing - Large-scale chemical production processes - Engineering, procurement, and ... construction firms Our culture is built on three principles: Extreme Ownership - We take full ...

Mariana Minerals

Staff Process Modeling Engineer

Houston, TX · On-site

$100K - $160K/yr

About Mariana Minerals Mariana Minerals is a software-first, vertically integrated minerals company ... Competency with Python or MATLAB for model automation, data processing, and custom calculations is ...

Mariana Minerals

Process Safety Engineer

Houston, TX · On-site

The Role Mariana Minerals is seeking a Process Safety Management (PSM) Engineer to help build, administer, and continuously improve the company's process safety and major hazard risk management ...

Mariana Minerals

Mechanical Engineer

Houston, TX · On-site

$140K - $175K/yr

You will design, build, and commission mineral processing and metallurgical refining equipment ... Lead mechanical engineering scopes across project phases-from concept and feasibility through ...

Mariana Minerals

Structural Designer

Houston, TX · On-site

Experience in industrial, mining, minerals processing, chemical, or heavy-industrial environments ... Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale.

Mariana Minerals

Sr. Data Engineer

Houston, TX · On-site

$101K - $137K/yr

Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying ... directly with process engineers, ML engineers, and operations teams. Preferred : • Bonus ...

Mariana Minerals

Sr. Estimator

Houston, TX · On-site

... mining and mineral processing projects. This role is responsible for developing accurate ... Collaborate with engineering, procurement, and project management teams to ensure accurate and ...

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Trainee Minerals Processing Engineer information

What skills and qualifications are needed to be a trainee minerals processing engineer?

To thrive as a Trainee Minerals Processing Engineer, you need a solid understanding of mineral processing principles, typically supported by a degree in chemical, metallurgical, or mining engineering. Familiarity with process simulation software, laboratory testing equipment, and safety management systems is commonly required. Strong analytical skills, attention to detail, and effective teamwork are standout soft skills in this role. These competencies are essential for optimizing mineral recovery, ensuring safety, and contributing to efficient plant operations.

What does a trainee minerals processing engineer do?

As a Trainee Minerals Processing Engineer, your daily activities often include monitoring ore processing operations, collecting and analyzing samples, and assisting with troubleshooting plant equipment. You'll also collaborate closely with senior engineers and plant operators to implement process improvements and ensure safety protocols are followed. These tasks are essential for optimizing production efficiency and quality, while also supporting the team's broader objectives of maximizing resource recovery and minimizing environmental impact. Over time, you'll gain exposure to project management and technical reporting, which can open pathways to more advanced engineering roles.

What is a trainee minerals processing engineer?

A Trainee Minerals Processing Engineer is an entry-level professional who assists in the extraction and processing of minerals from ores. They work under the supervision of experienced engineers to learn about crushing, grinding, separation, and concentration techniques used in mineral processing plants. Their responsibilities typically include monitoring equipment, collecting samples, analyzing data, and ensuring that safety and environmental standards are met. This role serves as a foundation for gaining practical experience and advancing to more senior engineering positions within the mining and minerals industry.

What is the difference between Trainee Minerals Processing Engineer vs Junior Minerals Processing Engineer?

AspectTrainee Minerals Processing EngineerJunior Minerals Processing Engineer
QualificationsTypically pursuing or recently completed relevant degree (e.g., Mining, Mineral Processing)Usually holds a degree in a related field, with some practical experience
Work EnvironmentTraining programs, supervised tasks, entry-level site workMore independent responsibilities, project involvement
Employer UsageInternship or apprenticeship programs within mining companiesEntry-level full-time roles in mineral processing plants or consulting firms

The main difference is that a Trainee Minerals Processing Engineer is in a learning or internship phase, focusing on gaining foundational skills, while a Junior Minerals Processing Engineer has completed their education and is taking on more responsibilities in processing operations.

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What cities in Texas are hiring for Trainee Minerals Processing Engineer jobs? Cities in Texas with the most Trainee Minerals Processing Engineer job openings:
Trainee Minerals Processing Engineer jobs near you

Hydrometallurgical Process Engineer

Mariana Minerals

Houston, TX • On-site

$100K - $175K/yr

Full-time

This job post has expired today. Applications are no longer accepted.

Job description

About Mariana Minerals
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.
The Role
Mariana Minerals is looking for a highly motivated Hydrometallurgical Process Engineer to work on building the critical minerals supply chain to support the world's energy transition.
As a Hydrometallurgical Process Engineer at Mariana Minerals, you will lead the development and deployment of first-of-its-kind chemical refining processes, while also supporting development of software for capital project execution and automated plant optimization. Responsibilities will include leading equipment scopes from concept through to design, installation, commissioning, ramp, and handover to the operations team.
What You'll Do
  • Lead hydrometallurgical process equipment scopes from concept development and modeling validation through procurement, detailed engineering, fabrication, installation, commissioning, and ramp-up
  • Manage external technology licensors, equipment vendors, and engineering partners to deliver fully integrated and performant hydrometallurgical refining systems
  • Develop detailed heat and material balances for complex hydrometallurgical process trains, including leaching, solution purification, solvent extraction/ion exchange, precipitation, crystallization, and residue handling
  • Build hydraulic models and process flow diagrams/P&IDs for hydrometallurgical circuits, ensuring operability, reliability, and safety
  • Create first-principles models of chemical reactors and unit operations (e.g., leach reactors, autoclaves, SX settlers, IX columns, precipitation reactors, filtration systems) to validate scale-up and derisk commercial designs
  • Identify, evaluate, and implement engineering solutions to optimize extraction, purification, and recovery processes under varying chemistry, feedstock qualities, and operating conditions
  • Collaborate deeply with R&D, lab staff, pilot-plant engineers, and operations teams to translate bench-scale insights into robust and scalable hydrometallurgical flowsheets
  • Work closely with software and machine-learning teams to automate process-engineering workflows and develop advanced control, optimization, and digital-twin models for hydrometallurgical reactors and plants
What You'll Bring
  • Strong understanding of engineering fundamentals and demonstrated ability to leverage the understanding to solve challenging problems
  • Strong foundation in chemical engineering, metallurgical engineering, or process engineering, with demonstrated ability to apply engineering fundamentals to complex hydrometallurgical systems
  • Experience with equipment engineering and design. Including but not limited to:
  • Brownfield modifications and upgrades of process equipment (e.g., leach tanks, reactors, filtration systems, solvent extraction circuits)
  • Greenfield design of hydrometallurgical unit operations and integrated circuits
  • Troubleshooting, evaluation, and optimization of operating hydrometallurgical or chemical-process equipment
  • Experience with the following industries and/or production environments:
  • Hydrometallurgical mineral processing or metal refining
  • Large-scale mining, critical-minerals processing, or battery-materials production
  • Industrial chemical manufacturing with complex aqueous/chemical reaction systems
  • Engineering, procurement, and construction (EPC/EPCM) firms supporting mining and mineral processing industry projects
Our culture is built on three principles:
Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions.
Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale.
Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.
Join us as we build the future of responsible mineral sourcing and supply.

Apply