GUE Instructor resumé

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Classes I teach:
Discover Diving
Recreational Supervised Diver
Recreational Diver 1 - Nitrox
Recreational Diver 2 - Triox
GUE Fundamentals
Doubles Diver
Drysuit Diver
Navigation Primer
Rescue Primer
Triox Primer
DPV Diver 1
DPV Cave
Scientific Diver
Cave Diver 1
Cave Diver 2
Triox Cave Upgrade
Cave Sidemount
Recreational Dive Leader

Mark Messersmith

United States

352 870 3000
352 870 3000


  • C.O.O. - Halcyon Manufacturing Inc.
  • Messersmith Development Company, Inc. specializing business to business consulting and new product development.
  • a business brokerage firm specializing in the purchase and sale of scuba diving related businesses.
  • Formerly an executive with a few international entertainment companies.
  • Research Associate - Hubbs-Sea World Research Institute
  • Co-Training Director and rebreather diver for the Woodville Karst Plains Project


  • 1981 B.A. University of California, Los Angeles - Biology
  • 1986 M.B.A. Pepperdine University - Business

Diving Qualifications

  • Board of Director GUE
  • Instructor Examiner GUE
  • Cave Instructor GUE
  • Rebreather GUE
  • Assorted other certifications

Diving Experience

  • 4000+ Dives
  • 2500+ Dives in caves
  • thousands of dives utilizing stage bottles
  • hundreds of dives utilizing Diver Propulsion vehicles
  • hundreds of hours of Rebreather Experience
  • Prototype Test Diver

Special interests

  • I started diving as a kid in the late 60's and have been in and around the water my entire life. After many years playing many organized sports, I now spend most of my leisure time cave diving in North Florida. My wife of 37 years and I participate in a number of Christian activities.


  • Photographs and articles in a variety of publications including Time Life and National Geographic