Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies. Backed by Khosla and a16z.
About the role
We are hiring a Senior Systems Administrator to take primary ownership of hands-on systems administration, infrastructure implementation, and day-to-day user support across Mariana's corporate, field, and industrial sites, freeing the Senior IT Manager to focus on architecture, budget, and cross-organizational strategy.
What they're looking for
- 5+ years in systems and network administration with end-to-end ownership of infrastructure projects, not just ticket-based support
- Deep hands-on experience with Microsoft 365 and Entra ID, including centralized authentication and SSO configuration
- Strong networking fundamentals — VLANs/segmentation, firewalls, VPNs, wireless, routing/switching — with direct enterprise hardware experience
- Working proficiency in PowerShell or similar scripting for administration and automation
- Experience managing organization-level software/service licensing, including renewals and vendor coordination
- A track record of building processes, systems, or tools from scratch, and comfort operating with incomplete documentation and ambiguity
More about this role
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 Senior Systems Administrator to take primary ownership of hands-on systems administration, infrastructure implementation, and day-to-day user support across Mariana's corporate, field, and industrial sites, freeing the Senior IT Manager to focus on architecture, budget, and cross-organizational strategy.
This is a foundational, builder-oriented role rather than a purely operational one. Core capabilities such as device management, centralized authentication, backup and disaster recovery, incident response, and change management are still being established, and this person will help build them, not just run them. Because Mariana operates a live mine, a greenfield construction site, and growing pilot facilities at the same time, the role requires close coordination with Controls/OT engineering, Software Engineering, HR, managed service providers,...
Browse similar: Startup jobs · San Francisco Bay Area