William has over 40 years of experience in geotechnical, mining and civil engineering projects, as well as complex numerical modelling applied to rock mechanics and programming of relevant software. His expertise in open pit mining includes slope stability analysis for small and large pits like Chuquicamata, Esperanza and Pelambres (Chile), Olympic Dam (Australia). Oyu Tolgoi (Mongolia) and Quellaveco (Perú). He has done analysis of the interaction between open pits and underground mining operations. His experience with underground mine includes the analysis of block caving mines like El Teniente and El Salvador (Chile), mining sequence, open stoping, stability of pillars and interaction of block caving operations with mine facilities. He is also experienced in the analysis of slopes under static and seismic conditions, and the stability analysis of other mine related structures such as tailings dams, heap leach piles and waste rock dumps. William has carried out seismic risk assessments in different regions of South and Central America, Africa, Papua New Guinea and Canada involving the definition and generation of earthquake simulation for dynamic analysis. He has also worked on the analysis and design of concrete and steel buildings and bridges, through the use of self-developed software. His programming expertise lies in the development of software to analyse and model rock falls (RFall_3D), wedge rock stability (MWedge_P), gravity flow (MFlow), generation of artificial earthquakes for dynamic analysis (Crono) and discrete facture network and block stability (Frac_Rock). He is also a competent user of geotechnical programs such as FLAC, FLAC3D, UDEC, PFC, PFC3D, Slide, Phases2, SWedge and Unwedge. He has given several FLAC and FLAC3D training courses for consultants and geotechnical engineers for different mines.