 | IUKF # 200202 | |
| Dojo: Mattson Uechi-Ryu Karate Orlando | ||
| Sensei: David Berndt | ||
| Country: United States of America | ||
| Current Rank Hachidan | Current Title Hanshi | Current Master Certifications Shihan |
| Shodan | OKIKUKAI | R. Yogis | 15/01/1990 | |
| Nidan | OKIKUKAI | R. Yogis | 15/06/1997 | |
| Sandan | SOKE Uechi Family | John Bassett | 25/05/2000 | |
| Yondan | IUKF | George E. Mattson | 10/01/2004 | |
| Godan | IUKF | George E. Mattson | 04/03/2006 | |
| Rokudan | IUKF | George E. Mattson | 08/08/2008 | |
| Nanadan | IUKF | George E. Mattson | 06/08/2016 | |
| Kyoshi | IUKF | George E. Mattson | 06/08/2016 | |
| Renshi | IUKF | George E. Mattson | 08/08/2008 |