The South African Institute of Engineering Geologists (SAIEG) is a voluntary organisation representing the profession of engineering and environmental geology. Members are required to be registered natural scientists as prescribed in The Natural Scientific Profession Act (Act 27 of 2003). The SAIEG represents a profession of approximately 200 engineering and environmental geologists. Engineering Geologists investigate and provide geologic and geotechnical recommendations, analysis, and design associated with human development since primarily called geological geoscientists.