The Neotec team

Three instructors. One standard.

Instructor Trainers, explorers and field trainers: the Neotec team brings together complementary profiles, from rebreathers to adaptive diving, with a single guiding principle: safety through rigour.

Combined dives
6 500+
Certified students
1 000+
Neotec training since
2011
Sébastien Wilem, founder of Neotec, with his rebreather Founder

Sébastien Wilem

Course Director & Technical Instructor Trainer

Passionate about water since 1997, Instructor Trainer and active explorer (−230 m). A former police officer and tactical instructor, he has led training at Neotec since 2011.

Dives
3 000+
CCR hours
3 350+
Students
750+
  • TDI Technical IT
  • Course Director
  • CCR IT Liberty & Megalodon
  • Full Cave / Mine IT
  • DAN IT
Portrait of Alain Margrève, Neotec Instructor Trainer Instructor Trainer

Alain Margrève

Instructor Trainer & explorer

Specialist in rebreathers, cave diving, children's diving and public-safety operations (police & fire brigade). President and lead instructor of Sub Aqua Club Wiltz.

Dives
2 000+
Students
300+
Years as lead
15+
  • SDI Instructor Trainer
  • TDI Technical IT
  • FRTI First Aid IT
  • Public Safety Diver
  • Scubility
Guy Zimmer, Neotec instructor, in a dry suit Instructor

Guy Zimmer

Instructor · children & adaptive diving

A diver since 2018, he has never stopped training to improve. He trains adults, introduces children to diving and makes diving accessible to people with disabilities (Scubility).

Dives
1 500+
Hours
900+
Instructor
2025
  • SDI Instructor
  • TDI Intro to Tech
  • Technical DPV
  • FRTI First Aid
  • Scubility