Willow Grove Studio is owned and operated by Mister Daniel Sullivan. His martial arts experience spans a period of over thirty years. He is a certified instructor through the Korean Kumdo federation and the Korean Hapkido Federation. He personally trains under Grand Master Hee Wk Kim, the president of both the KKF and the KHF of Maryland. Mister Sullivan also holds a permanent teaching position as a hapkido and kumdo instructor at Korean Martial Arts, Inc.