Senior Electrical Engineer — Industrial Power Systems Lead

Mariana Minerals; San Francisco (CA); On-site; USD 140,000 - 210,000; Full time

Job summary

Mariana Minerals seeks a Senior/Staff Electrical Engineer to own MV/LV power systems for its refining and minerals processing facilities in San Francisco Bay Area. You will set the electrical design basis and perform studies, then review third-party deliverables while self-performing critical packages through procurement, field, commissioning, and energization.

You will lead design against NEC/IEEE/NFPA 70E standards, build ETAP models, and manage long-lead equipment procurement.

Qualifications

• 8+ years designing MV/LV power distribution for industrial process facilities (EPC/owner’s engineer).
• Hands-on ETAP, SKM PowerTools, or EasyPower modeling.
• Deep knowledge of load flow, short circuit, motor starting, protective coordination, and arc flash.
• Specification and procurement of MV switchgear, unit substations, transformers, MCCs, VFDs, and e-houses.
• Fluency in NEC, IEEE, NFPA 70E and hazardous-area classification.
• Able to redline EPC deliverables and produce them in-house when faster.
• Bachelor of Science Electrical Engineering; PE strongly preferred.

Responsibilities

• Own MV/LV design basis including voltage levels, grounding, fault levels, redundancy, and standby power.
• Build and maintain plant load list and carry through from concept to detailed design.
• Size and configure distribution: MV switchgear, substations, e-houses, MCCs, LV/MV VFDs, UPS, DC systems.
• Maintain ETAP model as single source of truth; update with load changes.
• Prepare datasheets and specs for MV/LV equipment.
• Lead procurement: technical bid eval, vendor drawing reviews, FAT, long-lead management.
• Write electrical scope of work for third-party contracts and review deliverables.
• Self-perform packages when advantageous; coordinate across multi-disciplinary phases.
• Classify hazardous areas and design equipment accordingly.
• Support construction/commissioning: RFI resolution, testing, and turnover packages.
• Write energization plans and switching procedures for energized plant commissioning.

Skills

MV/LV power design

ETAP modeling

Load flow and protection coordination

Procurement and specs

NEC/IEEE/NFPA 70E

EPC/Owner's engineer experience

PE preferred

Education

Bachelor of Science Electrical Engineering

Professional Engineer (PE) preferred

Tools

ETAP

SKM PowerTools

EasyPower

Job description

Mariana Minerals seeks a Senior/Staff Electrical Engineer to own MV/LV power systems for its refining and minerals processing facilities in San Francisco Bay Area. You will set the electrical design basis and perform studies, then review third-party deliverables while self-performing critical packages through procurement, field, commissioning, and energization.

You will lead design against NEC/IEEE/NFPA 70E standards, build ETAP models, and manage long-lead equipment procurement.