---
title: 'Workplace Manager at Mariana Minerals'
canonical: 'https://feeny.ai/job/workplace-manager-mariana-minerals-houston-2qt1cym87ha0'
type: 'job'
last_seen: '2026-11-06'
---

# Workplace Manager at Mariana Minerals

- **Company:** Mariana Minerals
- **Location:** Houston, TX
- **Compensation:** $100k–$135k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-30
- **Last confirmed live:** 2026-11-06
- **Apply:** https://jobs.ashbyhq.com/marianaminerals/3ae0d810-7760-4a1a-a016-7ee2d0c5f13d

## 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 Workplace Manager to own the day-to-day operations of our Houston office, be a resource for our Houston pilot plant, and remotely support our Ann Arbor satellite office as needed. You will create an engaging, welcoming, safe, and well-run on-site environment where our team can do its best work. As our Workplace Manager, you will be the go-to person for everything that keeps the office running smoothly, from facilities and vendors to safety, supplies, and visitors. You will manage the workplace budget for your site, build the processes and systems that help the space scale as we grow, and make sure every employee and guest has a great experience on site. This is a highly visible, hands-on role with the autonomy to improve how our workplace operates. You will partner closely with teams across the company and report to the Global Workplace Director.

## What You’ll Do

- Manage day-to-day operations of the Houston office, including facilities, maintenance, cleanliness, and supplies, providing workplace support to the Houston pilot plant and Ann Arbor office as needed
- Serve as the primary point of contact for building management and service vendors, and manage contracts and service levels
- Plan and manage the workplace budget, tracking spend and finding cost-saving opportunities
- Maintain a safe and compliant workplace, including emergency procedures, safety walkthroughs, and incident follow-up
- Manage office access, security, and visitor experience, including badging and guest check-in
- Coordinate space planning, furniture, and moves, and prepare the office for new hires
- Plan and run company events, meals, and on-site gatherings that build culture and collaboration
- Respond to employee workplace requests quickly and track them to resolution
- Occasional travel to our project site in East Texas to support workplace needs
- Identify and automate repetitive workplace tasks, and document processes so the office scales with the company
- Partner with IT, People, Finance, and leadership on workplace needs and company-wide initiatives

Desired Qualifications

- 3+ years of relevant experience in workplace, facilities, or office operations
- Experience coordinating vendors and managing contracts and budgets
- Working knowledge of workplace health and safety practices and building operations
- Strong organizational skills and the ability to manage multiple priorities in a fast-paced environment
- Clear, professional communication and a service-oriented mindset with employees at all levels
- Proactive, resourceful problem solver who takes ownership and follows through
- Comfortable with technology and workplace tools (for example, ticketing, scheduling, or visitor management systems)
- Ability to work on-site in Houston, with flexibility for occasional events outside regular hours and occasional travel to East Texas
- Ability to comfortably lift up to 35 lbs 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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