Sr. Electrical Engineer

About Mariana Minerals

Mariana Minerals is a software-first, vertically integrated minerals company dedicated to supplying critical minerals essential for modern energy, AI, and defense technologies. We aim to reimagine the minerals supply chain through advanced software, automation, and data-driven decision-making.

Role Overview

Mariana Minerals is seeking a highly motivated Senior Electrical Engineer to support the design and implementation of power systems for critical mineral infrastructure. This role involves leading and contributing to the development of high, medium, and low voltage electrical distribution systems for innovative chemical refining processes. The responsibilities span from conceptual studies to detailed design, construction, commissioning, and energization, with a focus on system modeling, analysis, and compliance with relevant 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 brownfield and greenfield equipment design.
• Deep knowledge of power system engineering, with hands-on experience in designing and analyzing 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.

Culture

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.

Compensation Range

$140K - $175K