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Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying critical minerals for modern energy, AI, and defense technologies. The company is reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.
As a Staff Mechanical Engineer, you will lead the design, integration, and deployment of pilot-scale mechanical systems and processing equipment for a next-generation minerals processing pilot plant in Houston. This is a highly hands-on role that plays a key part in building and maintaining a first-of-its-kind facility.
Key responsibilities include:
- Design, specify, and deploy mechanical systems and equipment for pilot-scale mineral processing operations
- Translate process requirements into practical mechanical and plant designs in collaboration with process engineers
- Support installation, troubleshooting, and maintenance of pilot plant equipment including pumps, piping systems, reactors, separators, filtration systems, and material handling equipment
- Develop and maintain mechanical design documentation including equipment specifications, layout drawings, piping schematics, and CAD models
- Identify opportunities to improve equipment reliability, maintainability, and operational performance
- Coordinate with vendors, fabricators, and contractors during equipment procurement and installation
- Contribute to hazard reviews, equipment safety design, and mechanical integrity programs
Required qualifications:
- B.S., M.S., or PhD in Mechanical Engineering or related field
- 9+ years of experience in operations, process scale-up, or plant design in minerals processing, chemicals, specialty materials, oil & gas, or related industries
- Demonstrated experience driving equipment design, commissioning, operations, and reliability
- Experience with furnaces, pumps, fluid handling systems, pressure vessels, reactors, piping systems, valves, filtration, separation equipment, and materials handling
- Strong troubleshooting and problem-solving skills in hands-on plant environments
- Excellent technical writing, communication, and teamwork abilities
- Commitment to health, safety, environmental compliance, and mechanical integrity standards
- Ability to work in fast-paced environments, wear multiple hats, and manage ambiguity
