The Indonesian Soil Engineering Association (HATTI) is an organization that brings together land engineers in Indonesia. Land engineers who are members of this organization must have a certificate of expertise in carrying out their professional expertise. The certificate of expertise is important as a reference for expertise for Indonesian experts to work abroad and for foreign experts to work in Indonesia. There are 3 (three) categories of expertise certificates, namely, Young Geotechnical Certificate (G-0) Associate Geotechnical Certificate (G-1) and Main Geotechnical Certificate (G-2).
