Electrical Engineer

Electrical Engineer Mariana Minerals San Francisco, CA Job Details Full-time $120,000

• $150,000 a year 2 hours ago Qualifications Construction detail documentation Construction specifications Distribution network design Construction RFI responses Distribution switchgear

NFPA 70E

electrical safety protocols Technical documentation 5 years Load flow analysis Mining plant experience Arc flash analysis System design for system development Manufacturing facility Electrical load calculations Technical solutions implementation Uninterruptible power supplies (UPS) High-voltage electrical systems Analysis skills Construction plans As-built drawings Design development Low-voltage electrical systems Electrical protection systems Design engineering Power system protection Protection coordination analysis Motor control equipment ETAP Industrial equipment Electrical drafting for industrial equipment projects Full 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 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 the following industries and/or production environments: Industrial manufacturing Large-scale mining or mineral processing Large-scale chemical production processes 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.

Join us as we build the future of responsible mineral sourcing and supply. 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.

Compensation Range:

$120K

• $150K