"Sumit Bose, IAS, Secretary, Department of Revenue, Ministry of Finance, designated as Finance Secretary," said an official release on appointments cleared by the ACC.
Bose, a Madhya Pradesh cadre officer, is the senior most Secretary in the Finance Ministry. Arvind Mayaram (Economic Affairs) and Ratan P Watal (Expenditure) are the other two Secretaries.
The Appointments Committee of Cabinet (ACC) also upgraded V R Sadasivam as the Additional Secretary (Finance) in the Department of Atomic Energy.
The post of the Finance Secretary fell vacant after R S Gujral, who was also looking after the Expenditure Department, retired last month.