Northwest Geotech has served private and public customers across several end-markets throughout the Pacific Northwest since 1983. NGI maintains one of the most comprehensive soil mechanics and construction materials testing laboratories in the Western United States. NGI is accredited to ISO/IEC standards by A2LA. It maintains validation by the US Army Corps of Engineers and laboratory certification by Oregon Department of Transportation for inspection and testing of various construction materials. In addition, NGI is a Special Inspection Agency with registration by the Oregon Building Officials Association and the Washington Association of Building Officials.