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Mechanical Engineering Intern

Mariana Minerals
Houston, TX

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Job Details

Internship
$25 - $35 an hour

Qualifications

Equipment service recordkeeping
Industrial equipment design
Material handling systems
Mechanical blueprint interpretation
Coordinating with subcontractors on construction projects
Bachelor of Science
Mechanical Engineering
Mechanical system commissioning projects
Piping and instrumentation diagrams (P&IDs)
Industrial equipment installation
Manufacturing facility
Mechanical drawings
As-built drawings
Design engineering
Industrial pumps
Engineering functional testing
Commissioning phase involvement
Design of mechanical systems
Documentation Handling
Working on construction projects
Field commissioning
Manufacturing company experience
Field engineering
Entry level

Full 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

We are hiring a Mechanical Engineering Intern to work on real, high-impact problems within the Process & Plant Engineering team. You will contribute directly to our Deep Sea Nodule Refining Pilot Plant project, working closely with engineers and domain experts.

This role is designed to provide hands-on experience building and shipping solutions, not just supporting tasks.

What You’ll Do

Assist with mechanical design and specification of equipment for a multi-metal pyrometallurgical and hydrometallurgical pilot plant, including vessels, pumps, heat exchangers, and material handling systems
Support preparation of equipment datasheets, procurement packages, and vendor drawing reviews
Assist with physical installation activities on-site, including layout coordination, alignment checks, and interfacing with fabrication and construction contractors
Participate in commissioning activities including pre-commissioning inspections, punch list tracking, and functional testing of mechanical systems
Maintain organized documentation of as-built conditions, equipment records, and commissioning logs

Desired Qualifications

Currently pursuing a B.S. or M.S. in Mechanical Engineering, with coursework in fluid mechanics, machine design, or materials
Exposure to piping systems, pressure vessels, or rotating equipment design is an asset
Comfortable working in an active construction or industrial environment with appropriate safety protocols
Strong attention to detail and ability to read and mark up engineering drawings and P&IDs
Proactive, hands-on work style; prior internship or co-op experience in an industrial or manufacturing setting is a plus

Why Join Us?

At Mariana Minerals, you’ll be part of a mission-driven team reshaping the way critical minerals are sourced and supplied globally. You’ll have the autonomy to make big decisions, the tools to innovate, and a culture that values ownership, smart automation, and collaboration.

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.

Mariana is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected status.

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About Mariana Minerals

The Role

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Why Join Us?

Our culture is built on three principles:

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