The 1985-batch IAS officer's appointment came soon after the 52-year-old Thakur was sworn in as chief minister.
Nanda, a Himachal Pradesh cadre officer, is presently posted as additional chief secretary (Urban Development, Housing and Town and Country Planning).
A major bureaucratic reshuffle is believed to be on the cards.
Thakur, on December 25, said that "tired and retired" officials, re-employed by the previous Congress regime, will be asked to leave immediately.
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