Senior Electrical Engineer

Mariana Minerals; San Francisco (CA); On-site; USD 100,000 - 145,000; Full time

Job summary

Mariana Minerals is looking for a highly motivated Electrical Engineer based in San Francisco, California, to design and implement power systems crucial for mineral infrastructure. You will lead the development of electrical distribution systems, ensuring compliance and reliability across various voltage levels.

The ideal candidate will have 5-10+ years of experience in electrical engineering, strong knowledge of power systems, and proficiency in modeling tools like ETAP and SKM PowerTools. Join us in reshaping the critical minerals supply chain.

Qualifications

• 5-10+ years experience with electrical engineering in industrial settings.
• Experience in design and analysis of HV, MV, and LV electrical systems.
• Proven ability to deliver detailed electrical packages and specifications.

Responsibilities

• Design and develop power distribution systems across networks.
• Perform power system studies including load flow and short circuit analysis.
• Collaborate with cross-functional teams and support field implementation.

Skills

Electrical engineering and design

Power system engineering

Electrical system modeling tools

Knowledge of electrical codes and standards

Heavy industrial experience

Tools

ETAP

SKM PowerTools

EasyPower

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 how minerals are sourced, refined, and optimized by combining deep industrial expertise with software, automation, and data‑driven decision‑making. Join us as we build the future of responsible mineral sourcing and supply.

Role Overview

Mariana Minerals is seeking a highly motivated Electrical Engineer to support the design and implementation of power systems that enable the build‑out of critical mineral infrastructure vital to the global energy transition.

In this role, you will lead and contribute to the development of high, medium, and low voltage electrical distribution systems for first‑of‑its‑kind chemical refining processes. Your work will span the full project lifecycle—from conceptual studies to detailed design, construction, commissioning, and energization. You will also be responsible for system modeling and analysis, ensuring that power systems are robust, reliable, and compliant with applicable standards.

What You’ll Do

• Design and develop power distribution systems across high, medium, and low voltage networks for industrial infrastructure projects.
• Produce and review single‑line diagrams (SLDs), panel schedules, wiring diagrams, grounding plans, conduit/cable schedules, and equipment specifications.
• Perform power system studies including:
• Load flow and voltage drop analysis
• Short circuit analysis
• Arc flash hazard assessment
• Protective device coordination
• Select and specify electrical equipment such as transformers, switchgear, motor control centers (MCCs), variable frequency drives (VFDs), and UPS systems.
• Design and implement protection and relaying schemes, including relay settings and coordination for system reliability.
• Interface with utility providers, coordinate interconnections, and support applications and grid compliance efforts.
• Collaborate with cross‑functional engineering teams (mechanical, civil, process), vendors, and contractors to support system integration and field implementation.
• Support construction, commissioning, and energization with field engineering support, RFI resolution, and as‑built documentation.

What You’ll Bring

• 5‑10+ years experience with electrical engineering and design, including but not limited to brownfield equipment modifications and upgrades, and greenfield equipment design.
• Deep knowledge of power system engineering, with hands‑on experience in the design and analysis of HV, MV, and LV electrical systems in industrial settings.
• Experience with electrical system modeling tools such as ETAP, SKM PowerTools, or EasyPower.
• Familiarity with relevant electrical codes and standards, including NEC, IEEE, NFPA 70E, and ANSI/IEC standards.
• Proven ability to deliver detailed electrical engineering packages, including design calculations, technical drawings, and equipment specifications.
• Experience with industrial manufacturing, large‑scale mining or mineral processing, large‑scale chemical production processes, and engineering, procurement, and construction firms.

Why Join Us?

At Mariana Minerals, you’ll be part of a mission‑driven team reshaping the way critical minerals are sourced and supplied globally. You’ll have the autonomy to make big decisions, the tools to innovate, and a culture that values ownership, smart automation, and collaboration.

Our Culture is built on three principles:

• 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.

Mariana is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected status.