Derek Johnson also known as (Cheung Tai Lik Sifu 張大力師傅) Started learning Jow Ga Kung Fu 周家功夫 in 1978 from his late Master Dean Chin (Chan Yuk Chun) 陳 沃 進 in Washington D.C. Chinatown. Master Chin passed away in 1985. Derek Johnson’s Grand Master & godfather ((師公)-契爺 is the late Chan Man Cheung 陳萬祥 of Hong Kong, who was a disciple of Jo Si Jow Biu周彪. Master Chan Man Cheung introduced Derek to his last Jow Ga teacher, Master Kong Yu Choi 江譽財 of the Jow Biu Chinese Boxing Association Hong Kong 周彪國術聯誼會(香港). Derek's Grand Master under Kong Yu Choi is the late Hung Tai Wai 孔憲鴻 who was a classmate of Chan Man Cheung and also a disciple of Jo Si Jow Biu 周彪.
Derek is the founder of the 周家功夫體育協會Jow Ga Kung Fu Athletic Association, which has branches around the country . Derek teaches Jow Ga Kung Fu in honor of its' famous founders known as "The Jow Ga Five Tigers", Jow Lung周龍, Jow Hip周協, Jow Biu 周彪, Jow Hoi 周海, and Jow Tin 周田.