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.

The Role

Mariana Minerals is looking for a highly motivated Engineering Manager, Piping & Stress Analysis, with experience managing a piping design department, completing pipe stress analysis, and developing and implementing pipe, pipe support, and valve specifications. Mariana Minerals is building the critical minerals supply chain to support the world’s energy transition.

As an Engineering Manager, Piping & Stress Analysis 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 basic and detailed engineering strategies, managing external engineering firms, staff-aug contractors, and internal teams, developing issued-for-construction engineering packages for piping and static equipment.

What You’ll Do

• Lead and manage a piping team of internal, staff-aug, high-value engineering center, and third party engineering firm piping designers

• Oversee execution of piping engineering deliverables across multiple projects

• Establish and maintain piping design standards, specifications, and best practices

• Perform pipe stress analysis using Caesar II, including flexibility analysis, thermal expansion, and load cases

• Conduct dynamic analyses such as slug flow, water hammer, and vibration assessments

• Define allowable loads, evaluate equipment nozzle loads, and ensure compliance with applicable codes

• Develop, maintain, and update piping material specifications and engineering standards

• Design and specify pipe supports, guides, anchors, expansion joints, and specialty components

• Provide detailed markups and technical guidance for piping layouts, isometrics, and support designs

• Review and approve 3D models (Plant3D, CADWORX, Revit) to ensure constructability and compliance with stress and design requirements

• Generate and review bills of materials for piping systems and supports

• Ensure all piping systems comply with ASME B31.3

• Review and approve key deliverables including isometrics, support drawings, material submittals, and vendor packages

• Collaborate with process, mechanical, and structural teams to optimize system design

What You’ll Bring

• Bachelor’s degree in Mechanical Engineering or related field

• 10+ years of experience in piping engineering, with demonstrated leadership responsibilities

• Strong foundation in piping engineering with deep understanding of stress analysis and design principles

• Extensive experience with ASME B31.3 piping code

• Expertise in pipe stress analysis tools (Caesar II required; Nozzle Pro preferred)

• Experience developing piping specifications, standards, and support design criteria

• Familiarity with 3D design platforms such as Plant3D, CADWORX, Revit, and Navisworks

• Experience managing or leading piping teams within an EPC or EPCM environment

• Professional Engineer (PE) license or ability to obtain (preferred)

• Experience in one or more of the following:

  • Industrial manufacturing

  • Mining or mineral processing

  • Chemical processing or large-scale industrial plants

  • Engineering, Procurement, and Construction (EPC) organizations

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.