On 18 February 2014, by decree of the President of Russia, he was appointed First Deputy Head of the Main Directorate of Criminal Investigation of the Ministry of Internal Affairs of the Russian Federation, Viktor Golovanov.

[10] On 16 February 2016, by order of the President, he was appointed Executive Secretary of the Working Group on Monitoring and Analysis of Law Enforcement Practices in the Field of Entrepreneurship.

[12] On 27 July 2016, Dmitry Mironov was summoned to a meeting with Russian President Vladimir Putin, after which he was appointed Acting governor of Yaroslavl Oblast until the September 2017 election.

[13] The newspaper Kommersant noted that Mironov, like the new governor of Tula Oblast, Aleksey Dyumin, came from the guard of Vladimir Putin and “was one of the adjutants of the head of state”.

The journalist of Komsomolskaya Pravda, Alexander Gamov, found out that Mironov has good relations with a native of the Yaroslavl region, the world's first female astronaut, State Duma deputy Valentina Tereshkova.

In an interview published on 11 November 2016, Gamov notes that the governor (at that time - acting) travelled around Yaroslavl in an unmarked car, and without security.

The press became aware of the marriage from the declaration of income and property of the governor, which is published on the website of the regional government, where a column appeared about the spouse.