Contract Piping Design Engineer

About the company

Mariana Minerals is a software-first, vertically integrated critical minerals company that engineers, builds and operates mines and refineries using its MarianaOS platform.

About this role

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. ROLE OVERVIEW Mariana Minerals is seeking a Piping Design Engineer to join our team. This position may be filled as a contractor or contract-to-hire, depending on the candidate's experience and business needs. As a Piping Design Engineer at Mariana Minerals, you will lead the design of piping and related systems from concept design through the production of fabrication and construction drawings. We are revolutionizing the way industrial plants are designed and built and we are looking for a hands-on engineer to lead the design and engineering of full piping scopes. WHAT YOU’LL DO - Develop plant layouts and conceptual designs through requirements engineering and strong collaboration with all disciplines. - Design and model piping and equipment arrangements in AutoCAD Plant 3D. - Setup and draft process flow diagrams (PFDs) as well as (P&IDs). - Develop and draft construction drawings including piping isometrics and layout drawings. - Work as part of teams, managing or being managed by other designers and engineers. - Develop the full piping package for projects including specifications, standards and standard details. - Perform piping stress analysis and materials selection. - Define requirements for third party 3D equipment models and P&IDs to integrate into Mariana Minerals hosted AutoCAD Plant 3D environment. - Perform piping analysis, validation and verification independently or under the supervision of a licensed Professional Engineer. - Actively engage in development of Mariana’s internal software tools. WHAT YOU’LL BRING - Bachelor’s degree in Mechanical Engineering or a related engineering discipline. - 2D drafting experience including PFDs, P&IDs, Plot Plans, etc. - 3D modeling experience including Piping design, isometric generation, etc. - Demonstrated ability to deliver integrated and validated piping designs. - Strong understanding of engineering fundamentals and a demonstrated ability to leverage that understanding to solve challenging problems. - Ability to work effectively with cross-functional teams, manage competing priorities, and deliver high-quality engineering packages under schedule constraints. - Proficiency in CAD software, preferably AutoCAD Plant3D, with a proven track record of producing accurate and efficient designs. 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.