Oversee the operation and lifecycle of the complete power chain, including utility service, transformers, medium- and low-voltage switchgear, ATS and paralleling gear, generators, UPS systems and batteries, PDUs, RPPs, and rack power (A/B feeds). Strong hands-on knowledge of HVAC systems, including chilled water plants, chillers, CRAC/CRAH units, air handlers, controls, and airflow management.