Mikhail Mishustin never had any political ambitions as a career bureaucrat and his name didn’t came up as a top candidate to become Russia’s next prime minister.

But the 53-year-old Mishustin, the longtime chief of Russia’s tax service, was tapped for the post by President Vladimir Putin. The lower house of Russia’s parliament, the Duma, quickly appointed Mishustin as prime minister on Thursday.

Putin put Mishustin’s candidacy forward on Wednesday night, several hours after Dmitry Medvedev resigned along with the whole Cabinet. Just before that, Putin proposed sweeping changes to the constitution that could keep him in power well past the end of his term in 2024.