Hands-On Critical Infrastructure Experience: Demonstrated hands-on experience installing, maintaining, and troubleshooting large commercial and industrial electrical and mechanical systems, including: Medium-voltage switchgear, 480/277V and 208/120V electrical generation and distribution systems; Diesel-powered AC standby generators and associated fuel systems; Static UPS systems and Dynamic Rotary UPS (DRUPS) systems (where applicable); Multi-string flooded cell, VRLA, or Lithium-ion battery systems and monitoring systems; Static transfer switches (STS), Automatic transfer switches (ATS), PDUs/PMMs, and data center power distribution/management systems; PLC and relay logic controls, Power Monitoring Systems (EPMS), and Building Automation Systems (BAS/BMS); Chillers, AHUs, CRAC/CRAH units, cooling towers, pumps, motors, VFDs, and chemical treatment systems. The Critical Facility Engineer III (Shift Lead) is a senior facilities-focused leadership role responsible for the operational integrity, commissioning, and regulatory compliance of the electrical power, mechanical, monitoring, and control systems, as well as the processes that maximize customer uptime in the most cost-effective manner for highly available, concurrently maintainable, fault-tolerant mission-critical data center environments.