She competed at the 2004 Summer Olympics in Athens where she received a gold medal in the rhythmic group competition.

[2] She is the second group rhythmic gymnast to win two gold medals in the Olympic Games after Natalia Lavrova.

Posevina was one of the 50 elite athletes of Russia chosen as an honorary ambassador for the 2013 Summer Universiade in Kazan.

[3] Posevina is a resident of Nizhny Novgorod, Russia and is now working as a rhythmic gymnastics coach.

Posevina graduated from the Faculty of Physical Education and Sports of Lobachevsky State University of Nizhni Novgorod in 2013.