Discipline Overview for Geotechnical and Foundation Engineering: This civil engineering discipline entails the solution of all subsurface engineering problems. Geotechnical engineers are responsible for conducting and interpreting site investigations, the measurement of the soil's hydraulic and physical properties, and all subsurface design for civil structures. These include: dams, harbors, bridges, levees, retaining walls, tanks, tunnels, highways, and all major structures. The geotechnical discipline is now multi-discipline, skilled in traditional foundation engineering and in the maturing geo-environmental discipline to demonstrate sustainability. Geotechnical engineering calls for the blend of qualitative judgment with analytical solutions to meet the subsurface challenges in today's infrastructure.