Claude Delfosse Zacharias is a PADI (Professional Association of Diving Instructors) Staff Instructor, Advanced Rebreather Instructor, and CCR40 Instructor for the Hollis Prism2. He is also a RAID (Rebreather Association of International Divers) Instructor and an experienced diving equipment service technician.

Between 2003 and 2023, Claude owned and operated Lidingö Dykskola, which later became Z-DYK & BÅT. After several years, the business was simplified and rebranded as Z-DYK / Z-DIVE.

In 2026, the time felt right for a more substantial upgrade of the website, resulting in Alpha & Omega Diving. The name reflects Claude’s philosophy that diving is everything—from the beginning to the end.