Senior Electrical Design Engineer

TAR•Austin, TX

About The Position

As an Electrical Design Engineer, you will be responsible for the electrical design documentation that transforms architectural concepts into a buildable power plant. This includes creating single-line and three-line diagrams, wiring schedules, and system schematics for islanded Behind-The-Meter (BTM) microgrids. Your role will involve sizing systems, conductors, overcurrent protection devices (OCPD), disconnects, and switchgear across Medium Voltage (MV), Low Voltage (LV), and DC collection systems. You will also produce the technical inputs and basis-of-design that the Engineer of Record (EOR) will use for their stamp. You will report to the Director of Power Systems Engineering, translating system architecture into the drawing set that guides procurement, the EOR, and field operations. This role focuses on owning the design basis, the drawing set, and design quality, while coordinating the EOR's review and stamp. It does not involve being the project's stamping engineer of record or laying out controls logic, which is handled by the controls engineer.

Requirements

BSEE, power systems, or related STEM discipline.
3+ years in utility-scale solar, BESS, or power-systems design, with hands-on ownership of SLDs/three-lines and equipment sizing.
Proficiency in electrical CAD (AutoCAD Electrical or similar) and a power-system study tool (SKM, ETAP, CYME, or similar).
Strong understanding of NEC, NESC, IEEE standards; working knowledge of UL 1741-SB, UL 9540/9540A, and NFPA 855 for PV and energy-storage integration.
Conductor, OCPD, disconnect, and switchgear sizing across DC, LV, and MV (34.5 kV class).
Experience producing basis-of-design and working to or with an Engineer of Record.
Extreme attention to detail with a bias for speed and rapid iteration.

Nice To Haves

Direct ground-mount utility-scale PV + BESS design experience.
MV collector, MV switchgear, and substation-adjacent design exposure (up to 500kV).
Islanded, off-grid, or BTM microgrid experience.
Familiarity with grid-forming vs grid-following inverter architecture at the system level.
ERCOT / Texas project experience.
High-velocity, detail-rigorous engineering culture (Tesla Energy, SpaceX, Array, Nextracker, or comparable).

Responsibilities

Create and maintain electrical single-line and three-line diagrams, wiring schedules, and system schematics for islanded BTM microgrids.
Size conductors, OCPD, disconnects, and switchgear across MV/LV and DC collection in compliance with NEC, UL 1741-SB, UL 9540, and NFPA 855.
Produce the basis-of-design and technical inputs the Engineer of Record requires, and coordinate the EOR's review and stamp.
Develop equipment layouts and DC collection designs (string/harness, combiner, inverter skid, MV collector) for ground-mount PV + BESS.
Maintain the drawing set through revisions from design through IFC, ensuring procurement, the EOR, and field execution work from a single source of truth.
Support OEM technical evaluation (inverter skids, BESS, MV switchgear) with the electrical inputs needed for selection and PO.
Track FEOC-compliant equipment options where ITC eligibility is at stake.