---
title: 'Sr. Recruiter at Mariana Minerals'
canonical: 'https://feeny.ai/job/sr-recruiter-mariana-minerals-san-francisco-3weevfs4g06c'
type: 'job'
last_seen: '2026-10-16'
---

# Sr. Recruiter at Mariana Minerals

- **Company:** Mariana Minerals
- **Location:** San Francisco, CA
- **Compensation:** $100k–$175k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-07
- **Last confirmed live:** 2026-10-16
- **Apply:** https://jobs.ashbyhq.com/marianaminerals/a538a091-92fc-4807-9575-8d940a2e443b

## 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.

## The role

We are hiring a Sr. Recruiter to build the teams behind the teams at Mariana Minerals. You'll own full-cycle recruiting across corporate functions, helping us scale a software-first critical minerals company from the ground up. You'll partner directly with functional leaders to understand what great looks like, find people who have done this at fast-growing companies, and give every candidate an experience that reflects who we are. This is a great fit for someone who loves the full recruiting cycle, builds trust quickly with leaders, and wants to help shape how a company hires.

## What You'll Do

- Own full-cycle recruiting for G&A and corporate roles, from intake through offer close
- Partner with hiring managers and executives to define role requirements, hiring plans, and interview processes
- Build creative sourcing strategies for both active and passive candidates across finance, legal, HR, operations, procurement, and other functions
- Run personalized, thoughtful outreach that reflects our mission and stage
- Manage multiple searches at once while keeping a high quality bar
- Coach interviewers and hiring managers on structured interviewing, calibration, and debriefs
- Lead compensation conversations, close candidates, and manage competing offers
- Keep Ashby clean and current, and track pipeline health, time to fill, and other key metrics
- Share market insights on compensation, talent availability, and competitor activity
- Help build and improve recruiting processes, templates, and playbooks as we scale
- Represent Mariana Minerals with a warm, engaging, and transparent candidate experience
- Build diverse, high-quality pipelines across experience levels
- Opportunity to help build our early-career and university recruiting efforts, including internships and new grad hiring, as we grow

Desired Qualifications

- 5-8+ years of full-cycle recruiting experience, with meaningful G&A or corporate recruiting in a high-growth startup or technology company
- Experience recruiting across a range of functions (finance, legal, people, operations, sales, marketing)
- Proven ability to partner with senior leaders and executives
- Strong sourcing skills, including LinkedIn Recruiter, Boolean search, and passive candidate outreachExperience building recruiting processes or playbooks from scratch
- Experience hiring for early-stage finance, legal, or people teams
- Familiarity with seed-to-Series B recruiting environments
- Expert in ATS tools (preference for Ashby)
- Strong written communication and personalized outreach skills
- Strong closing and negotiation skills
- Data-driven approach to pipeline management
- High ownership mindset and comfort with ambiguity
- Passion for building exceptional teams and creating outstanding candidate experiences

## Nice to Have

- Experience with campus or early-career recruiting
- Experience in industrial, hardware, energy, mining, or deep tech companies

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
- [Logistics Analyst](https://feeny.ai/job/logistics-analyst-mariana-minerals-san-francisco-y00p556jbf2y) — San Francisco, CA
- [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