Meet your TDI / SSI / IANTD tec & rebreather instructors
Monty Graham
Owner – Canada
TDI / SDI Advanced Trimix Instructor
TDI Sidemount Instructor
Monty's diving career began in 2001 when he was trained as a deep sea / commercial diver in Seattle, Washington. As a developer of the sidemount courses he teaches, he sets standards at an incredibly high rate. Here at the tec center we train our divers hard but never disregarding safety. Having a record breaking open circuit dive in Roatan at 423ft/128mts. With 1300 certifications and nearly 1000 successful decompression dives, Monty will push you to your breaking point and make you a better diver for the rest of your dive career.
Henry Castellanos
Technical Rebreather Trimix Instructor for DiveTalk Academy, IANTD & TDI
Henry Castellanos is a highly experienced technical diver whose journey into the underwater world began in 2015 at the world’s largest aquarium located in Dubai U.A.E. In 2022, Henry’s interest in advanced diving took a decisive turn during a dive on a WWII wreck in Honolulu, Hawaii. Today, He is certified on six different rebreather systems, Technical Trimix Instructor for DiveTalk Academy, IANTD & TDI and has conducted dives exceeding 400 feet in depth, uncovering some of the most remarkable underwater sites on Earth. Henry brings a unique level of discipline and precision to diving, drawn from his career as a full-time commercial pilot, instructor, and test pilot. With over two decades of teaching experience and ratings on 15 different aircraft, he currently serves as a B777BBJ and B737BBJ Captain.
