Claude Delfosse Zacharias is a PADI (Professional Association of Diving Instructors) Staff Instructor and OC TEC 40 instructor, an Advanced Rebreather Instructor as well as a CCR40 instructor for the Hollis Prism2. He is also a RAID (Rebreather Association of International Divers) instructor. He is also an experienced service technician for various scuba brands. Before relocating to Malta, Claude ran his own dive center in Stockholm, Sweden (2003-2022). He has dived all over the world and has been teaching for many years