Bhubneswar,22/05: Senior OAS officer Kalyan Kumar Rath takes charge as OSD to Chief Secretary from his predecessor Dillip Routrai IAS. He is presently posted as Director Odia Language, Literature & Culture Dept. and newly formed Odisha Parivar. He was in addl charge of OSD to CS after his new posting as Director Odia Language, Lit. & Culture Dept. and has served as OSD to CS for a record period of 10years in a row, working with 6 CSs.