Skills & Experience 5-7 years of experience installing, maintaining, or troubleshooting large industrial systems, including chilled water systems, chillers, cooling towers, pumps, HVAC, diesel generators, UPS systems, and more. Knowledge Requirements Expert understanding of mechanical and electrical data center systems including power distribution, generators, transformers, UPS, switchgear, chilled water systems, CRAC/CRAH units, and fire life safety systems.