Kang served as general manager of the Tukjang Youth Coal Mine starting in 2003, and since January 2007 has served as an official in the Ministry of Power and Coal Industries. In August 2003, he also served as a delegate in the 11th Supreme People"s Assembly.
He is an alternate member of the Central Committee of the Workers’ Party of of Korea, and a delegate to the Supreme People"s Assembly. In September 2010, he was elected an alternate member of the Central Committee of the Workers" Party of of Korea. Kang served as a member of the national mourning committee upon the death of Kim Jong Il in December 2011.
