Preben Kæseler is certified to teach:
- PADI Open Water Diver Instructor
- PADI Advanced Open Water Diver Instructor
- PADI Deep Diver speciality Instructor
PADI Wreck Diver speciality Instructor
- PADI Dry Suit speciality Instructor
- PADI EAN Nitrox speciality Instructor
- PADI Peak Performance speciality Instructor
- PADI Sidemount speciality Instructor
- PADI Divemaster Instructor
- PADI Project Aware Instructor
- PADI DSD Instructor
- PADI Freedive Instructor
- SSI Open Water Diver Instructor
SSI Speciality Instructor wreck diving
SSI Speciality Instructor advanced wreck diving
SSI Speciality Instructor Deep Dive
SSI Speciality Instructor Dive Guide
SSI Speciality Instructor Dry Suit Diving
SSI Speciality Instructor Enhanced Air Nitrox
SSI Speciality Instructor Independent Diver
SSI Speciality Instructor Navigation
SSI Freedive Instructor Level 1
SSI Freedive Instructor Level 2
SSI Specialty Instructor Night Diving and Limited Visibility
SSI Specialty Instructor Perfect Bouancy
SSI Specialty Instructor Recreational Sidemount
SSI Specialty Instructor Science of Diving
SSI Specialty Instructor Search and Recovery
SSI Specialty Instructor Diver Stress and Rescue
SSI Specialty Instructor Reacht Right
SSI Specialty Instructor Freedive
TDI-SDI basics and specialities
