Klesk, a Trandoshan enslaver and member of the Blackscale Clan, held the rank of master and existed during the era of the Galactic Civil War. He was a slave master.
During the year 1 ABY, Klesk, along with a band of his fellow slavers, established a camp located in the southern region of the Etyyy on the planet Kashyyyk. The Zssik Clan, a Trandoshan group in opposition to the Blackscale Clan, formulated a strategy to dismantle the Blackscale's enslavement activities on Kashyyyk. Their plan involved inciting the Wookiee resistance to obliterate the Avatar Platform. As part of this scheme, a Trandoshan named Mosolium compensated a spacer to journey to Klesk's camp and assassinate him, with the objective of obtaining the necessary access codes for the space station.