FACTBOX: Russia's top officials: Who does what?

MOSCOW (Reuters) - Russian President Dmitry Medvedev appointed key Kremlin advisers and government ministers on Monday after consultations with Prime Minister Vladimir Putin.

Following are brief descriptions of the figures named so far to key Kremlin and government posts:

KREMLIN CHIEF OF STAFF - Sergei Naryshkin

Age: 53

Born in Leningrad. Educated as an engineer and radio mechanic before studying economics. Worked as economic adviser to the Soviet embassy in Belgium in the 1980s and later in the St Petersburg mayor's office. Deputy chairman of state oil giant Rosneft and chairman of Channel One state television. Chief of government staff since 2004. Speaks English and French. Some Russian and international reports have linked him to the KGB but this has never been officially confirmed.

KREMLIN FIRST DEPUTY CHIEF OF STAFF - Vladislav Surkov

Age: 43

Surkov was born in the southern Russian region of Chechnya where Islamic rebels have fought Russia in two wars since 1994. Surkov is credited with being one of the inspirations behind the pro-Kremlin youth group Nashi. He was one of Putin's main ideologues and is credited with devising the so-called "sovereign-democracy" political doctrine that is critics say is autocratic.

KREMLIN DEPUTY CHIEF OF STAFF - Alexei Gromov