---
title: 'Procurement Manager at Mariana Minerals'
canonical: 'https://feeny.ai/job/procurement-manager-mariana-minerals-san-francisco-9dyt2smqzrz8'
type: 'job'
last_seen: '2026-10-16'
---

# Procurement Manager at Mariana Minerals

- **Company:** Mariana Minerals
- **Location:** San Francisco, CA
- **Compensation:** $150k–$170k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-07-22
- **Last confirmed live:** 2026-10-16
- **Apply:** https://jobs.ashbyhq.com/marianaminerals/340bd277-38b5-4cf8-a542-750a1e808ba3

## 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. Mariana is hiring a Procurement Manager to own procurement for our new projects and pre-operational sites. This is a senior, self-directed role requiring deep technical and commercial experience in industrial procurement. In this role, you will ensure sites have the supply agreements, vendor relationships, and procurement coverage they need before they go live. You will work across engineering, operations, and commercial functions to translate project needs into executed contracts, and identify sourcing opportunities across the portfolio. This role covers operating supplies, consumables, and non-construction capital spend. Construction and fixed equipment procurement are owned by the Capital Projects team.

## What You’ll Do

- Work directly with engineering and technical teams to define procurement requirements for pre-operational sites; translate technical specifications into sourcing scope
- Own end-to-end pre-operational procurement: qualify vendors per established policy frameworks, run RFQ and competitive bid processes, negotiate pricing and contract terms, execute purchases, manage first deliveries
- Procure operating supplies and consumables (including reagents and spare parts) and non-construction capital spend (including mobile equipment)
- Ensure all contracts are reviewed for policy compliance and enterprise-level alignment prior to execution; flag clauses with broader implications
- Own vendor relationships through the pre-operational phase; ensure clean handoff to on-site procurement as sites become operational
- Support on-site procurement on complex purchases, high-value negotiations, and new project scope at existing operational sites
- Lead cross-site consolidation sourcing events to identify and capture volume-based savings opportunities
- Contribute quote data and supplier information to the organization's pricing and market intelligence database
- Coordinate across site and project teams to ensure continuity of supply through startup and into operations

Desired Qualifications

- Bachelor's degree in engineering, materials science, chemistry, or a related technical field required. Candidates without a degree who can demonstrate equivalent technical depth through experience will be considered.
- 8-12+ years of experience in procurement, project procurement, or capital purchasing in mining, industrials, chemicals, or a related sector
- Proven track record of owning pre-operational or greenfield site procurement from spec to first delivery
- Strong technical background with the ability to read specifications, understand process requirements, and engage credibly with engineering teams
- Excellent negotiation skills with a track record of securing favorable terms under time pressure and without a large team behind you
- Highly organized with the ability to manage multiple concurrent procurement workstreams across different projects and sites
- Comfortable operating with ambiguity and limited structure; takes ownership and figures it out
- Proficient with software tools for project tracking, workstream management, and reporting

Our culture is built on four principles:

Everyone Gets Home Safe. We never put speed or cost ahead of people. 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!

## About Mariana Minerals

## Company Overview
- **One-liner**: Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies.
- **Entity Type**: Private (Series A, $85M funding in July 2025)
- **Headquarters**: San Francisco, California, United States
- **Founded**: Not publicly available
- **Founders**: Turner Caldwell (Co-Founder & CEO)

## Core Business
- **Primary industry**: Metal Ore Mining / Critical Minerals
- **Target customers**: B2B – energy, AI, and defense supply chains (including downstream manufacturers and government entities)
- **Mission or purpose**: "Create a future of critical mineral abundance" by reimagining the global minerals supply chain with software, automation, and data-driven decision making.

## Products & Services
- **Copper One (formerly Lisbon Valley Copper Mine)**: World’s first autonomous mine, located in Utah. Produces copper using integrated automation and software control. Restarted production in April 2026.
- **Lithium One**: Lithium project (on the roadmap or early development).
- **Other mineral projects**: Graphite, Uranium, Rare Earth Metals, Cobalt, Nickel, Aluminium – at various stages (stealth or roadmap).
- **CapitalProjectOS**: Internal software platform for capital project management (mentioned in leadership bio).
- **Technology Stack**: React, dbt, TypeScript, Python, TensorFlow, PyTorch, microservices, SCADA, Autodesk, and many others – indicating a strong software engineering backbone.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total funding – $85M Series A (July 2025, 1 investor)
- **Notable Investors/Partners**: Lead investor not publicly disclosed (Andreessen Horowitz was pitched but not confirmed as an investor). Partners include Bot Auto, WeRide, Pronto, Atoms (based on LinkedIn mentions). Also works with UMA (Utah Mining Association).
- **Growth Signals**: Headcount grew 3,575% YoY to 107 employees (as of mid-2026). 73 active job postings. Opened the world’s first autonomous mine (Copper One) in April/May 2026, generating significant industry news and social media engagement.

## Competitive Advantages
- **Software-first approach**: The company builds automation and data systems from the ground up, rather than layering tech onto legacy mining operations. This enables fully autonomous mining.
- **Vertical integration**: They develop, own, and operate mineral projects, controlling the entire value chain from extraction to processing.
- **Deep tech stack**: Use of AI/ML (TensorFlow, PyTorch), simulation, and real-time control systems to optimize mining operations.
- **First-mover in autonomous mining**: Copper One is claimed to be the world’s first autonomous mine, giving them a significant lead in operational efficiency and safety.

## Strategic Focus
- Scale autonomous mining operations beyond copper (lithium, graphite, uranium, etc.)
- Secure domestic supply of critical minerals for U.S. energy, AI, and defense needs.
- Continue aggressive hiring across engineering, operations, and field roles.
- Expand from Utah to additional sites (Houston engineering office, potential new projects).

## Why Work Here
- **Culture principles**: "Extreme Ownership", "Engineer Out Requirements, Then Automate", "Share Your Legos" – emphasizing accountability, simplification, and collaboration.
- **Work environment**: High-growth startup with a mission-driven focus on critical infrastructure. Offices in San Francisco (HQ), Houston (Engineering), and La Sal, Utah (mine site). Hybrid/remote policy not explicitly stated, but multiple office locations suggest flexibility for field vs. office roles.
- **Notable perks**: Opportunity to work on cutting-edge autonomous systems and AI in a traditional industry. Strong engineering culture with modern tech stack (React, Python, ML). Rapid career growth due to company expansion.
- **Talent sources**: Attracts talent from Tesla, Redwood Materials, Lilac, ExxonMobil, Amazon Web Services, and other tech/energy companies – indicating a high-caliber peer group.

## Sources
1. [marianaminerals.com](https://marianaminerals.com/)
2. [marianaminerals.com/careers](https://marianaminerals.com/careers)
3. [marianaminerals.com/about](https://marianaminerals.com/about)
4. [jobs.ashbyhq.com/marianaminerals](https://jobs.ashbyhq.com/marianaminerals)
5. [linkedin.com/company/mariana-minerals](https://www.linkedin.com/company/mariana-minerals)

## Other roles at Mariana Minerals

- [IP Counsel](https://feeny.ai/job/ip-counsel-mariana-minerals-san-francisco-p7p8qadb6xg7) — San Francisco, CA
- [Commercial Counsel](https://feeny.ai/job/commercial-counsel-mariana-minerals-san-francisco-c0kbyd0vszp7) — San Francisco, CA
- [Maintenance Training Opportunities](https://feeny.ai/job/maintenance-training-opportunities-mariana-minerals-moab-sd5f5z532gz1) — Moab, UT
- [Commissioning Engineer](https://feeny.ai/job/commissioning-engineer-mariana-minerals-houston-370gtt85kmfw) — Houston, TX
- [Production Planner](https://feeny.ai/job/production-planner-mariana-minerals-houston-xf1gadffk1h4) — Houston, TX
- [Sr./Staff Process Engineer - Detailed Engineering and Plant Design](https://feeny.ai/job/sr-staff-process-engineer-detailed-engineering-and-plant-design-mariana-sfmfv4wge0eb) — Houston, TX
- [Sr. Technical Recruiter](https://feeny.ai/job/sr-technical-recruiter-mariana-minerals-san-francisco-hr9b2676c4vw) — San Francisco, CA
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- [Plant Design Manager](https://feeny.ai/job/plant-design-manager-mariana-minerals-houston-5hz4w45hkerz) — Houston, TX
- [Pilot Plant Operations Manager](https://feeny.ai/job/pilot-plant-operations-manager-mariana-minerals-houston-s78cx16gdpcm) — Houston, TX