Kees | GUE Instructor



Kees (“case”) Beemster Leverenz

I’m an enthusiastic diver and Global Underwater Explorers (GUE) instructor based in Seattle, Washington. I teach in a spacious and modern GUE facility called Eight Diving, which is located about 15 minutes south of downtown Seattle.

My goal is to impart the skills and experience I’ve learned over many years to my students. Whatever your interest: warm water or cold, colorful reef dives or deep wreck dives, I’d like to give you the tools you need to enjoy the underwater world as much as I do.


About Me

I got my open water diver class as a birthday gift in 2009, and I’ve been hooked ever since. I was fortunate enough to meet GUE divers from the local community soon after becoming certified. Their generosity and infectious enthusiasm has helped me immensely through the years. Around the same time, I started working as a scientific diver for the University of Washington and the local government. I participated in a number of projects: endeavors as exciting as developing tiny submarines and as dull as counting individual blades of grass.

Although I’m no longer counting grass, GUE has enabled me to continue my passion for project diving. More recently, I’ve been leading an effort to document the historic wrecks in Lake Washington in 3D. Thanks to GUE, I’ve also been able to collaborate with other skilled GUE divers on projects like the 3D mapping of Mars Makalös and the analysis of the caves of the Sian Ka’an Biosphere in Mexico.