Irina Feoktistova graduated from St. Petersburg Conservatoire, Russia. A classically trained pianist, she has performed in the major halls of St. Petersburg, Russia, and toured Europe and the United States as a soloist, duo pianist, and accompanist. In 1995, as a part of a piano duo, she participated in the Park Lane Group auditions and was chosen from 260 participants to perform at the Purcell Room of the Royal Festival Hall, one of the best in London. The piano duo Jana Polianovskaja / Irina Feoktistova won third prize at The First International Competition of Contemporary Music Interpretation in Weimar, Germany (1996).

In 1997 she gave series of concerts as a piano soloist with The Youth Philharmonic Orchestra of Flanders, conductor Mr. Robert Groslot. Also that year she participated in The Ninth International New Music Festival titled Sound Ways as a piano duo and recorded her first CD. Ms. Feoktistova relocated to the United States in 1998, and since then she has performed extensively in Chicagoland area and worked as a free-lance musician at the Roosevelt, Loyola, Northwestern, and DePaul universities. She has been involved in numerous musical theatre productions as an accompanist and music director. She is also active in various projects performing Russian and American contemporary music. Her USA tours include series of concerts with Russian singer and composer Elena Antonenko.

Since 2004, Ms. Feoktistova has had the privilege to be an accompanist for the world's foremost performer of Baroque trumpet, Crispian Steele-Perkins on his yearly USA tours. In 2004 she won The Kawai CD Recording Competition in piano solo category. Ms. Feoktistova is affiliated with CUBE , MAVerick and Vox3 ensembles in Chicago and with The Union of Composers in St. Petersburg, where in May of 2005 she performed a program of American contemporary music at the 41st International Festival St. Petersburg Musical Spring and recorded her CD titled Musical Bridge, Chicago – St. Petersburg. In 2005 and 2007 she participated in John Cage's Musicircus events organized by Chicago Composers Forum and The Museum of Contemporary Art. For the 2007 Musicircus event Irina initiated the Scriabin color-music program, that she performed piano solo accompanied by digitally created color animation projected on the stage background.

In 2005-2006 Ms. Feoktistova worked as a coach and interpreter for Vladimir Galouzine, the principal Russian tenor, performing in Manon Lescaut and Turandot at the Lyric Opera of Chicago. She worked as a back stage pianist for Der Rosenkavalier (2006) and played organ part with the Lyric Opera Orchestra for Richard Strauss' Die Frau ohne Schatten (2007, Sir Andrew Davis, conductor). Irina has been the principal keyboardist with Millennium Chamber Players, a Chicago based ensemble, since it was founded in 2006. Her recordings include piano solo Classical and Contemporary music. Her 20th century repertoire includes works such as Samuel Barber's Hermit Songs with Russian singer Elena Antonenko (2003); Schoenberg's Pierrot Lunare; Anton Webern works; Peter M. Davies's Eight Songs for a Mad King with Millennium Chamber Players . Her recent recordings include works by Alexander Scriabin, Nikolay Medtner and Frederick Chopin. In 2007 Irina was featured in the ‘The Fazioli Salon Series ‘, which was broadcasted live on 98.7 WFMT Chicago classical radio station.

On June 12th, 2008 Irina made her Carnegie Hall debut as a soloist and an accompanist with Russian singers Vladimir Galuzine, Methodie Bujor and Natalia Timchenko for the Ruassia Day Concert (N.Y., USA) Mrs. Feoktistova was an assistant conductor for the Lyric Opera of Chicago production of Mussorgsky "Boris Godunov" in 2011/12. Since then she was been affiliated with the Ryan Center of the Lyric Opera of Chicago working with the young singers as a Russian diction coach. Most recently she has been collaborating with internationally renowned singers Ferruccio Furlanetto and Andrea Silvestrelli as well as the cellist Nazar Dzhurin. In 2016/17 she was hired as Russian language coach for the Chicago Symphony Orchestra's performance of Prokofiev "Ivan the Terrible" working with Gerard Depardieu, under the baton of Maestro Riccardo Muti. Since 2016 she is also working as an accompanist with the Chicago Children Choir.

Irina Feoktistova is going to be working with Chicago Opera Theater in 2018/19 on the production of Tchaykovsky "Iolanta". She is currently on the faculty of Northwestern University Bienen School of Music.