Mechanical Engineer – Mineral Processing & Plant Design

Mariana Minerals; Houston (TX); On-site; USD 140,000 - 175,000; Full time

Job summary

Mariana Minerals is seeking a highly motivated Mechanical Engineer to lead the development of the critical minerals supply chain. You will design, build, and commission mineral processing equipment, develop first principles models, and drive plant optimization across project phases.

You will collaborate with process, structural, piping, electrical, and construction teams to deliver cohesive engineering packages from concept to handover to operations.

Qualifications

• Bachelor’s degree in Mechanical Engineering or a related discipline.
• Experience applying engineering fundamentals to solve complex problems.
• Experience preparing mechanical equipment specifications and vendor documentation.

Responsibilities

• Lead mechanical engineering scopes from concept through commissioning.
• Manage vendors through equipment lifecycle and bid evaluations.
• Develop plant layouts and optimize equipment arrangement for safety and integration.
• Prepare equipment specs, data sheets, and requisition packages.
• Perform static equipment design and code-compliant calculations.
• Conduct finite element analysis to validate designs.
• Collaborate with multidisciplinary EPC teams to deliver cohesive packages.
• Support construction and commissioning with RFIs and field changes.

Skills

Mechanical engineering

FEA

AutoCAD

Cross-functional teamwork

Problem solving

Education

Bachelor’s degree in Mechanical Engineering

Tools

AutoCAD

Job description

Mariana Minerals is seeking a highly motivated Mechanical Engineer to lead the development of the critical minerals supply chain. You will design, build, and commission mineral processing equipment, develop first principles models, and drive plant optimization across project phases.

You will collaborate with process, structural, piping, electrical, and construction teams to deliver cohesive engineering packages from concept to handover to operations.