Piping Design Engineer

Mariana Minerals; Houston (TX); On-site; USD 75,000 - 120,000; Full time

Job summary

Mariana Minerals is seeking a Contract Piping Designer in Houston to lead project configurations in AutoCAD Plant 3D and develop best practices for drafting and modeling from concept to detailed design.

You will set up Data Manager, draft PFDs and SMART P&IDs, and coordinate with EPC teams to ensure seamless integration of 3D models and P&IDs in our hosted environment.

Qualifications

• 5+ years of hands-on experience with AutoCAD Plant 3D.
• CAD administration experience.
• Proficient in 2D drafting (PFDs, P&IDs, Plot Plans).
• 3D modeling and isometric generation for piping.

Responsibilities

• Configure new projects in AutoCAD Plant 3D.
• Set up Data Manager and Smart P&IDs.
• Draft PFDs.
• Draft smart P&IDs.
• Develop plot plans and interface with third party teams.
• Define requirements for 3D equipment models and P&IDs to integrate into Mariana Minerals Plant 3D environment.

Skills

AutoCAD Plant 3D

CAD admin

2D drafting

3D piping modeling

Tools

AutoCAD Plant 3D

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 how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data-driven decision-making. Join us as we build the future of responsible mineral sourcing and supply.

Role Overview

Mariana Minerals is looking for a Contract Piping Designer to work on building the critical minerals supply chain. As a Piping Designer at Mariana Minerals, you will lead the configuration of projects in AutoCAD Plant 3D (or similar software packages), develop best practices and workflows for drafting and modeling, and support drafting and modeling activities from conceptual engineering through to detailed design.

What You’ll Do

• Configure new projects in AutoCAD Plant 3D
• Setup Data Manager and Smart P&IDs
• Draft process flow diagrams (PFDs)
• Configure and draft smart piping and instrumentation diagrams (P&IDs)
• Develop and draft plot plans
• Define requirements for third party 3D equipment models and P&IDs to integrate into Mariana Minerals hosted AutoCAD Plant 3D environment
• Define requirements for third party EPC companies to complete detailed engineering

What You’ll Bring

• 5+ years of experience with AutoCAD Plant 3D
• CAD admin experience
• 2D drafting experience. PFDs, P&IDs, Plot Plans, etc.
• 3D modeling experience. Piping design, isometric generation, etc.

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.

Compensation Range: $75K - $120K