---
title: 'Sr. Technical Recruiter at Mariana Minerals'
canonical: 'https://feeny.ai/job/sr-technical-recruiter-mariana-minerals-san-francisco-hr9b2676c4vw'
type: 'job'
last_seen: '2026-09-11'
---

# Sr. Technical Recruiter at Mariana Minerals

- **Company:** Mariana Minerals
- **Location:** San Francisco, CA
- **Compensation:** $100k–$175k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-10
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/marianaminerals/c0303d0f-8c05-4493-986e-ba19ab09de40

## 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. We are hiring a Sr. Technical Recruiter to help build world-class engineering and technical teams that will shape the future of industrial automation, AI, and critical minerals. In this role, you'll partner closely with recruiters, hiring managers, and technical leaders to identify, engage, and attract exceptional talent. You'll play a critical role in developing creative sourcing strategies, uncovering hard-to-find talent, and building long-term relationships with candidates before they're actively looking. This is an ideal opportunity for someone who enjoys research, thrives on solving difficult hiring challenges, and wants to help build a company from the ground up.

## What You'll Do

- Develop and execute sourcing strategies for highly technical roles across teams
- Build targeted searches that identify exceptional technical talent across multiple industries and research communities
- Research, identify, and engage passive candidates through highly personalized outreach
- Partner closely with recruiters and hiring managers to understand technical requirements, hiring priorities, and market dynamics
- Translate complex or evolving role requirements into effective sourcing strategies
- Build and maintain long-term relationships with high-potential candidates
- Conduct talent mapping, competitive intelligence, and market research to inform hiring strategies
- Continuously improve sourcing methodologies, tooling, and recruiting processes
- Track sourcing metrics and provide market insights to recruiting leaders and hiring managers
- Represent Mariana Minerals through a thoughtful and engaging candidate experience
- Help shape and strengthen Mariana Minerals' employer brand and technical talent narrative
- Stay current on sourcing technology, AI-assisted sourcing tools, and emerging channels to reach specialized technical talent
- Build diverse, high-quality candidate pipelines for hard-to-fill and highly specialized roles

Desired Qualifications

- 5-8+ years of experience sourcing technical talent in a high-growth startup or technology company
- Expert in utilizing ATS tools (preference for Ashby)
- Strong expertise with LinkedIn Recruiter, sourcing tools, Boolean search, Indeed, GitHub, research platforms, and other creative sourcing techniques
- Demonstrated ability to identify and engage passive candidates for difficult-to-fill technical roles
- Experience partnering directly with engineering leaders and hiring managers
- Excellent research skills with the ability to understand technical domains and evaluate technical talent
- Strong written communication skills with experience crafting personalized candidate outreach
- Ability to manage multiple searches simultaneously while maintaining a high quality bar
- Data-driven approach to sourcing strategy and pipeline management
- Strong closing and negotiating skills
- High ownership mindset with the ability to thrive in fast-paced, ambiguous environments
- Passion for building exceptional teams and creating outstanding candidate experiences

## Nice to Have

- Prior experience recruiting for hardware, robotics, industrial automation, or deep tech companies
- Experience sourcing for niche or emerging technical disciplines (e.g., materials science, controls engineering, applied AI/ML)
- Familiarity with early-stage or seed-to-Series B recruiting environments
- Experience building a sourcing function or playbook from scratch

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)

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