+31 6 4856 0245
- Self employed, dive centre 'Dive Solutions'
- teacher physical education
- GUE Instructor: Rec 1, Rec 2, Rec 3, Fundamentals, DPV1, Gasblender, Primers and Tech 1
- PADI Instructor
- IANTD Instructor
- Cave diver
- Sander is diving since 2001 all over the world, cold and warm, cave, technical and open water.
- Freelance author for magazine 'Duiken'