A notification issued by the General Administration Department said Kailashnathan's contractual appointment as CPS is now extended for a further period of two years with effect from December 26, 2017.
The officer is said to be a close confidante of Prime Minister Narendra Modi, having worked with him when Modi was Gujarat Chief Minister.
Kailashnathan (64), a 1979-batch Gujarat cadre IAS officer, retired in June 2013 when he was Additional Chief Secretary to then chief minister Modi.
He got an extension in 2015 when Anandiben Patel was the chief minister, and again in August 2016, till the remaining tenure of her successor, Vijay Rupani.
Now, with Rupani becoming chief minister for a second term following the BJP's Assembly victory, Kailashnathan will continue in his post till December 2019.