GUE Instructor resumé

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Classes I teach:
GUE Fundamentals
Doubles Diver
Drysuit Diver

Xavier Vrijdag

Auckland, New Zealand
Zaandam, Netherlands

+64 2102304558


  • Research fellow in diving medicine at the University of Auckland
  • Board member South Pacific Underwater Medical Society (SPUMS)


  • BSc and Msc in Technical Medicine, University of Twente
  • PhD in Anaesthesiology, University of Auckland "Monitoring gas narcosis in hyperbaric environments"
  • Royal Australian Navy Medical Officer Underwater Medicine course

Diving Qualifications

  • GUE: Tech1, Tech2, documentation diver, DPV, Instructor
  • TDI: JJ-CCR helitrox diver
  • NACD: full cave diver
  • SSI: freediving, recreational, technical and cave instructor
  • DAN: BLSD & oxygen provider instructor

Diving Experience

  • 1700+ dives
  • 150+ cave dives
  • 100+ wreck dives
  • 100+ decompression dives
  • 100+ hours CCR diving

Community Involvement

  • Speaker at OzTek and TecFest NZ
  • project diver at HMS buffalo re-examination project
  • project diver at Crayfish survey around Waiheke island

Special interests

  • Underwater hockey
  • Diving physiology


  • You can find my scientific publications at:

Languages I teach classes in

  • Dutch
  • English

Additional languages

  • Dutch and English