"The entire machinery will be geared up to fulfil the mandate of the new leader," Nripendra Misra, newly named as principal private secretary in the Prime Minister's Office, told The Hindu in an interview.
Misra said that Modi's policy priorities will "necessarily have to be implemented in a time-bound manner". They would focus on overcoming delays to major infrastructure projects and addressing why India has become a coal importer, he added.
Reuters reported exclusively last week that Modi was considering restructuring Coal India, the state-controlled mining behemoth, in a bid to halt a decline in output.
The Prime Minister's Office is expected to become a powerful centre of policy making under Modi, who has named loyalists such as Arun Jaitley to key posts like finance but whose cabinet team lacks strength in depth.
Modi was due to chair a cabinet meeting at 11am on Thursday, his office said, with a briefing to follow afterwards.