JAMSTEC (Japan Agency for Marine-Earth Science and Technology) Technical Advisory Team Board Member. Responsibilities include providing geomechanical insights on deep scientific drilling expeditions as part of the International Ocean Discovery Program (IODP). The task is to identify hazards while drilling and instrumenting a deep observation hole in the Nankai Trough Subduction Zone in Japan as part of the NanTroSEIZE project. In 2017-2019, David Castillo designed and executed a Real-Time Geomechanics program in preparation for using the R/V Chikyu during IODP Expedition 358 to intersect the subduction zone plate boundary. The 2019-2020 postmortem of this expedition has gained valuable information for successfully executing future drilling expeditions in the Nankai Trough Subduction Zone, including expeditions to penetrate the mantle at a site yet to be determined.