About Capt. Mark “Sharky” Alexander
Captain Mark “Sharky” Alexander started diving nearly 25 years ago as a Public Safety Diver for the Springfield/Sangamon Counta ESDA rescue squad in Illinois. Sharky is an active technical diver, closed circuit rebreather instructor and expedition leader, arranging and coordinating exploration expeditions around the world.
Sharky holds the following active dive credentials:
– IANTD CCR Normoxic Trimix Instructor
– TDI Inspiration Classic/Vision CCR Instructor
– TDI Advanced Nitrox / Decompression Proceedures Instructor
– IANTD Nitrox Instructor
– PADI Master Instructor
– PADI Distinctive Specialty Instructor
– PADI Specialty Instructor
– EFR Primary Care (CPR) & Secondary Care (First Aid) Instructor
– PADI Medic First Aid Instructor
– DAN Oxygen First Aid Instructor
– Advanced Diver Medical Technician
– Hyperbaric Chamber Technician
– USCG 100 Ton Master Captain License w/ Towing Endorsement
When Sharky is not diving he works full time as a paramedic, and as an instructor for EMT and Paramedic training courses. He instructs in areas of Advanced Cardiac Life Support, Pediatric Advanced Life Support, Advanced Pre-Hospital Traauma Life Support and Advanced Hazmat Support. He is on staff with Cardinal Glennon Childrens Hospital in St. Louis Missouri as a Pediatrics Advanced Life Support Instructor.
In September 2010, Sharky retired from the Illinois Air National Guard, with 20 years of service as an F-16 Aircraft Weapons Specialist. He served four tours in the Middle East, including in Kuwait, Saudim Arabia, Qatar and Balad, Iraq.
Sharky’s Underwater Expeditions was founded in 2007, and focuses on advanced dive travel, deep wreck exploration, specialized technical training and closed circuit rebreather training. Sharky specializes in closed circuit rebreather training and mixed gas training, as well as functioning as a dive medical officer, and offering medical seminars on remote medical treatment and logistics. For more about Sharky, click here.
Sharky has participated or led expeditions to many historic deep wrecks, including the Graf Zepplin, Andrea Doria, U-869, SS Carolina, USS Monitor and the search for Gertrude Tomkins-Silver’s missing P-51D Mustang.
Sharky has had the opportunity to do television work with Capt. Dan Crowell, former owner of the legendeary east coast dive boat Seeker. Sharky participated in the Military Channel’s Quest for Sunken Warships series, working on the episodes “Torpedo Alley” and “Truk Lagoon.” Sharky has also participated inthe History Channel’s Weird US Series, working on the episode “Weird Underworld.”
In 2010, Sharky was inducted into the Explorer’s Club, and remains an active participant at Explorer’s Club Functions.
In 2012, Sharky was inducted into the Royal Geographical Society.