Geotechnical Engineering is a branch of Civil Engineering focused on the engineering properties and behavior of natural and engineered geomaterials (soils and rocks), as well as the design and construction of foundations, earth dams and levees, retaining walls, embankments, underground structures and tunnels.

Geotechnical Engineering is a branch of Civil Engineering focused on the engineering properties and behavior of natural and engineered geomaterials (soils and rocks), as well as the design and construction of foundations, earth dams and levees, retaining walls, embankments, underground structures and tunnels.

Almost all construction projects involve geotechnical engineering as most structures are built on, in or of geomaterials. Additionally geotechnical engineering involves understanding soil(or rock)-structure interaction for mitigation of natural hazards such as earthquakes and landslides.

A more in depth description and definition can be found at the Colorado Association of Geotechnical Engineers website or at what is geotech?.