Newcomb and Boyd

Hood Patterson and Dewar is an electrical and mechanical testing, commissioning and engineering firm that acts as third-party commissioning agent on data centres, power plants and other mission-critical facilities. Its published commissioning scope runs from design, drawing and specification review through commissioning script development, factory witness testing, energised functional testing of individual components and integrated systems functional coordination, outage behaviour and capacity verification. It covers the Dallas and Fort Worth market from an office in Addison, Texas.

TMCx Solutions is a professional engineering firm specialising in independent third-party commissioning, with an office at Mesa, Arizona. It provided Level 5 integrated systems commissioning on the SRP-MIC IT data centre in Scottsdale, covering mechanical HVAC, electrical and fire protection systems, and enhanced commissioning on the Gila River Indian Community data centre in Phoenix. Its portfolio also lists critical facilities work for other data centre owners.

GAI Consultants runs a data centre and mission-critical facility commissioning programme organised into levels that parallel the project delivery lifecycle, from design through operations handover. Its published scope covers factory witness testing at the supplier's plant, load bank testing of generators and UPS at rated load, and integrated systems testing that simulates utility loss, generator failure, UPS failure and chiller failure. It serves the Phoenix market from an office in Tempe, Arizona.