NTH Consultants is an engineering consulting firm based in Northville, Michigan. It was founded in 1968 and provides a wide range of services, including geotechnical engineering, environmental consulting, construction materials testing, and forensic engineering. The company has worked on numerous high-profile projects, such as the reconstruction of the I-35W bridge in Minneapolis and the construction of the Detroit River International Crossing bridge. NTH Consultants has offices in Michigan, Ohio, Illinois, and Georgia, and serves clients in the transportation, energy, industrial, and public sectors.