Provide Tier II technical support and troubleshooting for critical infrastructure systems including AC power distribution, generators, ATS, UPS systems and battery strings, DC power plants and batteries, PDUs, STS, grounding, fire systems, HVAC equipment, CRAC units, chillers, dry coolers, condensers, pumps, buildings, and structural systems. Provides 24x7x365 Tier II technical support and troubleshooting for critical infrastructure systems, ensuring operational integrity, site readiness, business continuity, capacity planning, and cost-effective operation of critical facility equipment.