Yadav was on a six months extension after completing his tenure at the start of the year and his new extension came a day before his term was to end on July 24.
According to sources, the order was passed after getting the approval of Chief Minister Harish Rawat yesterday.
Already facing corruption charges, Yadav hit the headlines when a sting CD purportedly showed the official allegedly taking money from someone in public domain.
Meanwhile, another officer S N Verma, currently the Managing Director of Hydroelectric Power Corporation and an accused in a hydroelectricity project scam in Jharkhand has been given the additional responsibility of the Managing Director in the Power Transmission Corporation.