Sergey had been a member of Aria, Kipelov, Chorny Kofe, Metallachord and Nazad v Budusheye, and founded the band Mavrik (not to be confused with Maverick), though it is considered Mavrin's solo project since its latest albums are released with "Sergey Mavrin", not "Mavrik" named on the covers.

Mavrin studied to play the piano and electric guitar, though he never received formal music education.

After military service, in 1985 Sergey participated in Chorny Kofe ("Black Coffee"), one of the first Soviet metal bands, and then joined Metallachord.

Mavrin and Kipelov tried to start a band called Nazad v Budusheye ("Back to the Future"), but this project remained active only for two months.

In 1997 they released an LP entitled Kipelov and Mavrin – Smutnoye Vremia ("Time of Troubles"), which included 10 tracks.

Songs from this album became the main concert material for Sergey's new project: a band he started in 1998, which was entitled "Mavrik" due to his familiar nickname.

Arthur Berkut (ex-Autograph) joined Mavrik as a vocalist on its first album Skitaletz (Wanderer), where Mavrin played guitars, bass and keyboards.

Shortly after the album's release and subsequent touring, Berkut left the band, to be replaced by classically trained vocalist Stas Vytart.

During the recording of the third album, Himichesky Son ("Chemical Sleep", 2001), Artur Berkut often failed to show up in studio, and finally, Sergey had to fire him.

Mavrin participated in Kipelov's tour and in recording the Put Naverh live album and then the "Babylon" single.

Artistic differences reached the boiling point and led personal relations to a dead end.