Oversee installation of medium- and low-voltage electrical distribution systems, including utility service, substations, transformers, switchgear, generators, UPS systems, ATS/STS equipment, PDUs, RPPs, busway, grounding, bonding, and lightning protection. Support L1-L5 commissioning, including factory witness testing, equipment receipt verification, prefunctional checklists, startup, functional performance testing, load-bank testing, and integrated systems testing.