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
Mariana Minerals is seeking a highly motivated Sr. Site Development Engineer to lead the planning and design of greenfield project sites. In this role, you will be responsible for end-to-end site development—from early-stage site selection and feasibility through detailed engineering and construction execution—for first-of-its-kind mining and metallurgical processing facilities. You will work cross-functionally across engineering, construction, and project delivery teams to ensure sites are designed for constructability, scalability, and long-term operational performance. You will lead civil, grading, drainage, utilities, and site infrastructure design, manage external engineering partners, and support the development of internal tools and workflows for efficient capital project execution.
What You’ll Do
Develop and optimize site layouts, including grading, drainage, stormwater management, access roads, and utility corridors
Drive early-stage site selection, feasibility studies, and due diligence, including topography, geotechnical constraints, permitting considerations, and infrastructure access
Design and review earthwork plans, cut/fill balancing, and mass grading strategies to optimize cost and constructability
Coordinate site infrastructure systems including roads, drainage, underground utilities, and tie-ins to external infrastructure
Manage and coordinate external engineering firms, consultants, and contractors supporting civil and site development scopes
Oversee development of issued-for-construction (IFC) packages for site civil works
Collaborate with structural, process, mechanical, and electrical teams to ensure integrated and efficient site design
Review and validate 3D models and design packages (Civil 3D, Revit, Navisworks) for site and infrastructure systems
Conduct constructability reviews and support cost estimation and scheduling for site development scopes
Support permitting and regulatory approvals, including grading permits, stormwater compliance, and environmental considerations
Provide field engineering support during construction, resolving site-related issues in real time
Develop and improve standards, workflows, and tools for scalable site development across multiple projects
What You’ll Bring
Bachelor’s degree in Civil Engineering (Master’s degree preferred)
10+ years of experience in site development and civil engineering for industrial, mining, or large-scale infrastructure projects
Proven experience delivering greenfield capital projects from concept through construction
Professional Engineer (PE) license or ability to obtain within 6 months (preferred)
Technical Expertise
Site grading and drainage design
Earthwork optimization and mass balance
Stormwater management and hydrology/hydraulics
Roadway and access design
Underground utilities and infrastructure systems
Working knowledge of geotechnical principles and site constraints
Familiarity with permitting and regulatory requirements for site development
Proficiency with:
Civil 3D (required)
AutoCAD, Revit, Navisworks, Bluebeam
Experience reviewing and coordinating 3D design models and multidisciplinary layouts
Experience coordinating across civil, structural, process, mechanical, and electrical teams
Strong track record managing external engineering firms and contractors
Ability to operate in a fast-paced, cross-functional environment with evolving project
Industry Experience (Preferred)
Industrial manufacturing
Mining or mineral processing
Chemical or process facilities
Engineering, procurement, and construction (EPC) environments
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.