Special vigilance court judge Shyam Sunder Das also imposed a fine of Rs 25,000 on Kumar and his associate P C Das for the offence.
The judge rejected the bail plea of the IAS officer as an non-bailable warrant (NBW) was issued against his name.
Kumar and P C Das surrendered before the court yesterday as per the direction of the Orissa High Court.
"Though punishment of three years imprisonment is bailable, the court rejected Kumar's bail plea because a NBW was issued against his name," said government pleader Hemant Kumar Swain.
Kumar and five others were convicted by the special vigilance court on 3 July for committing financial irregularities of Rs 55 lakh in the ORHDC.
Sanjay Mohanty ex-assistant manager of ORHDC was only present in the court on 3 July, while the five other accused, including Kumar, were absent on that day.
The judge had issued non-bailable warrants against the five. The court had sentenced Mohanty to undergo rigorous imprisonment for three years and to pay a fine of Rs 25,000.
The high court in its order on 7 August had ordered Kumar and the five others to surrender before the trial court for hearing of sentences.
On 8 August, the special vigilance court had sentenced Asish Kumar Nayak, secretary of Gramya Bikash Manch; Pradeep Kumar Rout, ex-accounts officer, ORHDC and Chittaranjan Mallick, ex-accountant (contractual) ORHDC to three years rigorous imprisonment and a fine of Rs 25,000 each .
The Vigilance Directorate had registered a case against Kumar and the five others, accusing them of committing financial irregularities to the tune of Rs 55 lakh in the year 2000.