Gerald Naber began his study of Jujutsu, Kobujutsu, as well as Aikido at the Shinbukan Dojo in Amsterdam under Brent Hire Sensei in 2004, where he currently teaches Aikido.

Gerald Naber has the following student and instructor licenses:

• Aikido and Aikibujutsu Tanren Kenkyukai: Nidan / Shidoin