Are You A Pro? Join For Free

Mark Alexander

Sharky's Underwater Expeditions, LLC

Contact Information:

Saint Charles, MO 63304
United States

Years in Business:



Clients I'm Seeking:


Explorers, Rebreather divers, people interested in rebreather and SCUBA training. Wreck and DEEP wreck divers interested in diving some of the best wrecks in the world.

About My Business:


Captain Mark “Sharky” Alexander, FRGS is the owner of Sharky’s Underwater Expeditions. He has been diving since 1991 and has logged thousands of open water and technical dives. He holds instructor certifications with IANTD, TDI, and PADI training agencies. He has years of experience in teaching all areas of diving including recreational, rebreather, Normoxic Trimix and Advanced Nitrox and Decompression Procedures. He has the technical ability and skills needed for deep dives in many challenging environments. Sharky has led expeditions to explore the Andrea Doria, USS Monitor, EM Clark, and U-869 off the East Coast of the United States. In Europe, he has explored the Graf Zeppelin and the Willhelm Gustoff. Sharky has worked on projects with the Discovery Channel as a safety diver, line tender, and paramedic in Nome, Alaska during Bering Sea Gold’s “Under the Ice” television series. He was a dive team member for the Military Channel’s “Quest for Sunken Warships: Truk Lagoon & Torpedo Alley.” Sharky was also a deep water mixed gas diver and medical officer for the Gertrude Tomkins Expedition to search for the last missing WASP. Sharky is a full time paramedic for St. Charles County Ambulance District. He is an instructor in Advanced Cardiac Life Support, Pediatric Advanced Life Support, and Advanced Pre-Hospital Trauma Life Support. Sharky is a member of The Explorers Club, a fellow with The Royal Geographical Society with the Institute of British Geographers, and a retired 20-year veteran of the US Air Force with four deployments to the Middle East.

Years in business:
Member since:
Clients I'm looking for: