NGI/NTI is very experienced with materials testing and inspection services. The company has completed materials testing, special inspection, engineering, geologic, and environmental services on over 9,000 projects. NGI/NTI provides on-call materials testing and inspection services for Toyota, Weyerhaeuser, Georgia Pacific, Boise Cascade, British Petroleum, City of Portland, Chemeketa Community College, Portland Community College, Port of Portland, TriMet, the US Army Corps of Engineers, Boeing, Xerox Corporation, Tektronix, Centex Homes, VoiceStream Wireless (T-Mobile), and numerous other private companies and government agencies. NGI/NTI has provided professional and technical services for the cities of Tualatin and Wilsonville since 1983, and the City of Woodburn since 1990. NTI has provided flexible testing services for Lake Oswego Public Works projects since 1997. NGI/NTI is currently providing special inspection services under flexible service contracts for the Port of Portland, City of Portland Bureau of Parks & Recreation, City of Portland Bureau of General Services, and the City of Portland Materials Testing Lab.