Additional District and Sessions Judge Bamashankar Mishra convicted Tapan Sha and M Divya alias Shanti and awarded life term for for the abduction of the IAS officer on February 16, 2011.
While Sha was a former government employee and had worked as a Gram Rozgar Sevak, Divya was a Maoist.
The court, however, acquitted another accused Ghasiram Pangi due to lack of evidence.
The court pronounced the judgement after examining 23 witnesses including Vineel Krishna and Balwant Singh, who was the Project Director, District Rural Development Agency (DRDA) at the time of the abduction, said Government Counsel Bhabani Mishra.
He was returning to the district headquarter town here after attending a panchayat-level meeting when the Maoists intercepted them.
The abductors first released the junior engineer on February 22 and sent a letter listing their demands including halt to the operations by security forces and release of tribal rebels lodged in jail. The IAS officer was released on February 24 by the red rebels.