Midwest Regional Distributor for Add Helium dive store. Shop all dive gear including Shearwater Dive Computers, Rebreather accessories, and Open Circuit equipment.
Midwest Dealer for Silent Diving.com dive store and training. Shop all dive gear including Inspiration, Evolution, Evolution+ Closed Circuit Rebreathers, and Rebreather consumables. Rentals of Closed Circuit Rebreathers available.

Mark "Sharky" Alexander was inducted as a member of The Explorers Club in March, 2010.

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Webmaster: pirate@sharkys-ue.com

Captain Mark “Sharky” Alexander started diving 23 years ago as a Public Safety diver for the Springfield/Sangamon County ESDA (Emergency Services Disaster Agency) Rescue Squad in Illinois.  Sharky continued his diving career throughout the years.  He is now active in the following areas:

• IANTD CCR Normoxic Trimix Instructor
• TDI Inspiration Classic/Vision CCR Instructor
• PADI Master Instructor  MI-164349
• PADI Distinctive Specialty Instructor - Basic Sign Language  Oxygen First Aid 
• PADI Specialty Instructor – Boat, Deep , Dry Suit, Enriched Air , Night , Peak Performance Buoyancy, Project AWARE, Project AWARE Coral Reef Conservation, Underwater Naturalist
• EFR Primary Care (CPR) & Secondary Care (First Aid) Instructor
• PADI Medic First Aid Instructor
• DAN Instructor - Oxygen First Aid for Scuba Diving Injuries
• TDI Instructor Closed Circuit Rebreather Inspiration Classic/Vision Instructor
• TDI Advanced Nitrox and Deco Procedures Instructor
• IANTD Nitrox Instructor
• Advanced Diver Medical Technician
• Hyperbaric Chamber Technician
• USCG 50 Ton Master Captain license, near coastal with a licensed towing endorsement

When Sharky is not diving, he is working as a full-time Paramedic.  He also is an instructor for future EMTs and Paramedics.  He also instructs students in the areas of Advanced Cardiac Life Support, Pediatric Advanced Life Support, Advanced Pre-Hospital Trauma Life Support, and Advanced Hazmat Life Support.  He is also on staff with Cardinal Glennon Children Hospital in St. Louis, MO as a Pediatrics Advanced Life Support Instructor.

In September 2010, Sharky retired with 20 years in the Illinois Air National Guard.  He served four tours in the Middle East - Kuwait, Saudi Arabia, Qatar, and Balad, Iraq.  He was an F-16 Aircraft Weapons Specialist.

In May 2007, Sharky started his company: Sharky’s Underwater Expeditions, LLC.  His company focuses on doing more advanced travel, exploration, and specialized training.  He specializes in Closed Circuit Rebreather (CCR) Training.  He can provide medical seminars on remote medical treatment.  He has also provided technical and creative help on various diving TV series with KPI Productions in New York. 

Sharky has had the opportunity to do television work with Capt. Dan Crowell, former owner of the legendary dive boat the “Seeker.”  Sharky participated in the Military Channel's episodes of  “Quest for Sunken Warships,” “Torpedo Alley,” and “Truk Lagoon.”  Sharky also participated in the History Channel's series “Weird US” Episodes “Weird Underworld.”  

In October 2010, Sharky was involved in the search for Gertrude “Tommy” Tompkins-Silver and her missing P-51D Mustang aircraft.  Gertrude's plane came up missing in October 1944 off coast of Los Angeles, CA. Sharky's job on the expedition was Dive Medical Officer and Deep water Diver.

In March 2010, Sharky was inducted into the Explorer's Club.  He and his wife, Julie, attended the ECAD dinner in NYC.  Sharky has given his "Gertrude Tompkin-Sliver"  presentation at the St. Louis Chapter and for several other local organizations (Daughters of the American Revolution, and various schools and churches).