T N & Associates, founded in 1989, specializes in environmental services, natural resources, infrastructure engineering and construction services. It has its headquarters in Milwaukee and offices throughout the United States. The company works with federal, state, and local government agencies, as well as commercial and industrial clients. Its clients include United States Air Force, United States National Guard, U.S. Geological Survey, Milwaukee Public Schools, City of Maywood, Calif.; Coldwell Banker, Mid Valley Electric and Ventura Foods. T N & Associates' staff includes engineers, geologists, hydro geologists, biologists, ecologists, risk assessors, construction managers, site superintendents, health and safety specialists, surveyors, and CADD/GIS technicians.