Kymn held membership within the Black Sun organization, specifically in the year 24 ABY.
Black Sun strategically positioned Kymn as a dormant operative within the spice extraction facilities located on Kessel. Over time, he ascended to the position of Second Administrator overseeing the mining activities, serving under the Sullustan Chief Administrator, Nien Nunb. As a component of the criminal organization's scheme for galactic control, Black Sun seized control of the spice mines amidst an uprising.
Subsequently, Czethros, the head of Black Sun, personally appeared and endeavored to transmit an encrypted communication intended to activate the Black Sun operatives who had been strategically placed in numerous crucial roles within the New Republic administration. Nevertheless, Jedi initiates Jaina Solo and Lowbacca intervened and destroyed the transmitter before it could dispatch its message. Furthermore, the Jedi liberated the prisoners held captive within the spice mines by the Black Sun mercenaries.
In the course of the conflict, Kymn, along with his subordinates, were tricked into entering a remote area of the mines and subsequently confined by the deployment of robust plasteel barriers, effectively trapping them.