Electrical Engineer, Medium Voltage

Electrical Engineer — Power Systems (LV & MV)
Denver, CO Full-time

Boom Supersonic is building Superpower, a 42-megawatt industrial gas turbine derived from supersonic propulsion technology, purpose-built for frontier AI data centers where power demand is scaling faster than the grid can keep up. This role owns the full electrical system of the machine — from 28

VDC control circuits through 480

VAC skid distribution to 13.8kV generation and delivery — driving every valve, pump, actuator, sensor, and circuit that brings the machine to life and delivering dependable medium-voltage power to islanded critical loads.

There is no inherited architecture. You will reason from first principles, write the playbook, and make design decisions that shape this platform for years. When something doesn’t work at first energization, you are on‑site tracing signals, reading schematics, and finding the answer.

You own the end‑to‑end electrical design of Superpower — from LV architecture through MV commissioning. No handoffs. No deferring to vendors on hard decisions. You own the outcome.

In practice, that means three phases across both voltage domains:

• Preliminary Design — Define LV and MV architectures, single-line diagrams, interface requirements, protection philosophy, and concept of operations; specify and source long-lead switch gear and generator circuit breakers.
• Detailed Design — Produce wiring diagrams, schematics, cable schedules, load lists, I/O lists, protection coordination studies, relay settings, and supporting analyses.
• Build & Commission — Own first-article electrical checkout, first energization, relay commissioning, synchronization, load acceptance, step‑load testing, and field commissioning.

The LV domain spans 480

VAC skid-level distribution down to 12–28

VDC electronics across every support system on the turbine. Required expertise includes:

• LV power distribution, conversion, control, and protection across 480
  
  VAC skid distribution, machine control and actuation, instrumentation, and 12–28
  
  VDC electronics.
• Cable, harness, junction‑box, connector, and control‑panel architecture for skid‑mounted industrial equipment.
• Grounding, bonding, shielding, and EMI/EMC design across power, control, and instrumentation wiring.
• Electrical interfaces with the turbine control system — I/O definition, signal types, device power, per missives, and fault feedback.
• Motor control systems — VFDs, soft starters, contractors, overload protection, and control relays.
• Fuel system electrical integration — valves, actuators, heaters, instrumentation, and gas‑conditioning equipment.
• Lube oil system electrical integration — pumps, heaters, coolers, level/temperature/pressure instrumentation, and local controls.
• Starting system electrical architecture — starter motor interfaces, auxiliaries, per missives, and control circuits.
• SCR and emissions system electrical integration — injection systems, heaters, controls, instrumentation, and safety interlocks.
• Load bank auxiliary systems — fan power, controls, step‑switching interfaces, feedback, and interlocks.
• Cooling system electrical integration — radiator fans, cooling tower interfaces, pumps, VFDs, instrumentation, and controls.
• Enclosure and balance‑of‑plant electrical systems — HVAC, lighting, fire detection, suppression interfaces, access control, and safety interlocks.

The MV domain is 13.8kV islanded operation at industrial scale — no grid to lean on for frequency reference, fault current, or voltage stability. Required expertise includes:

• Generation, distribution, and protection of all medium‑voltage power from generator terminals through switch gear to downstream loads and optional grid interconnect.
• Generator excitation, voltage regulation, and interface requirements with the turbine control system.
• Switchgear and breaker systems — generator circuit breakers, feeder breakers, and bus‑tie configurations.
• Protection relay selection, settings, and coordination — differential, overcurrent, ground fault, voltage, and frequency protection.
• Fault‑current management, interrupting‑duty analysis, and equipment rating coordination.
• Frequency…