Igor Kolb graduated from the Belarusian State Choreographic College. From 1996 to 2022, he served at the Mariinsky Theatre (soloist since 1998). He won special renown with his roles in lyrico-romantic repertoire. His partners include such famous ballerinas as Ulyana Lopatkina, Diana Vishneva, Zhanna Ayupova, Svetlana Zakharova, Irma Nioradze and Daria Pavlenko.

Igor Kolb is the winner of numerous international ballet competitions and a guest star of the international festivals "Dance open", "Kings of Dance", "World Ballet Stars" and "World Ballet Virtuosos". The artist has toured with the Mariinsky Theatre in Russia and abroad.

He made his debut as Prince Désiré in The Sleeping Beauty (Rudolf Nureyev’s version) at the Opera di Roma in 2002 and as Siegfried in Swan Lake (Rudolf Nureyev’s version) at the Wiener Staatsoper in 2006. In 2007, he appeared in Andrei Moguchy and Alexei Kononov’s project “Silenzio. Diana Vishneva”. In 2009, a gala concert featuring world ballet stars "Igor Kolb and Friends" took place in Tokyo. That same year, the artist performed famous duets from the ballet Proust in the farewell tour of the famous Japanese ballerina Tamiyo Kusakari.

• La Sylphide (James, Madge), choreography by August Bournonville, Elsa-Marianne von Rosen’s version;
• Giselle (Albrecht, Hans), choreography by Jean Coralli, Jules Perrot and Marius Petipa;
• Le Corsaire (Ali), production by Pyotr Gusev after the composition and choreography of Marius Petipa;
• Swan Lake (Prince Siegfried), choreography by Marius Petipa, Konstantin Sergeyev’s version;
• The Sleeping Beauty (Prince Désiré), choreography by Marius Petipa, revival of the 1890 production;
• The Sleeping Beauty (Prince Désiré, Carabosse), choreography by Marius Petipa, Konstantin Sergeyev’s version;
• La Bayadère (Solor), choreography by Marius Petipa, revival of the 1900 production;
• Raymonda (Béranger), choreography by Marius Petipa, Konstantin Sergeyev’s version;
• George Balanchine’s ballets Symphony in C (I. Allegro vivo), Scotch Symphony, Piano Concerto No 2 (Ballet Imperial), Pas de Deux to Tchaikovsky’s music, Jewels (Diamonds) and Apollo (Apollo);
• The Nutcracker (the Prince), choreography by Vasily Vainonen;
• Romeo and Juliet (Romeo, Tybalt, Troubadour), choreography by Leonid Lavrovsky;
• Leonid Yakobson's ballets Shurale (Shurale) and Spartacus (Marcus Crassus, Athenian Jester);
• The Fountain of Bakhchisarai (Vaslav), choreography by Rostislav Zakharov;
• Yuri Grigorovich's ballet The Stone Flower (Severian), The Legend of Love (Ferkhad),
• Leningrad Symphony (Youth), choreography by Igor Belsky;
• Alexei Ratmansky’s ballets The Little Humpbacked Horse (Gentleman of the Bedchamber), Cinderella (the Prince);
• In the Night (2nd duet), choreography by Jerome Robbins;
• The Nutcracker (Drosselmeyer), choreography by Kirill Simonov, staging by Mihail Chemiakin;
• William Forsythe’s ballets Steptext and In the Middle, Somewhat Elevated;
• Le Bourgeois gentilhomme (Cléonte), choreography by Nikita Dmitrievsky;
• Le Divertissement du roi, choreography by Maxim Petrov;
• Radu Poklitaru's ballets The Dying Swan and Two for the Seesaw, duet from the ballet The Rain;
• Beginning, choreography by Vladimir Varnava;
• Autumn Colours, choreography by Yevgeny Panfilov; 
• Pas de six from La Esmeralda.

 In 2009, choreographer Radu Poklitaru staged a one-act ballet Two for the Seesaw specially for Igor Kolb.

Successfully combining artistic and teaching activities at the Boris Eifman Dance Academy and St Petersburg State Conservatory, Igor Kolb was also engaged in production and educational projects.

He is the artistic director of the project "Dance. Dance. Dance", the initiator and chairman of the organizing committee and jury member of the Open Art Festival in Veliky Novgorod.

In 2022, Igor Kolb was appointed principal ballet master of the Bolshoi Theatre of Belarus.

His productions with the Bolshoi Theatre of Belarus include:

2022 Adolphe Adam’s Giselle (choreography by Jean Coralli, Jules Perrot, Marius Petipa, Igor Kolb; Peasant pas de deux choreography by Igor Kolb)

2023 Illusions of Love to the music by Dmitri Shostakovich, Frédéric Chopin, Leonid Shirin (libretto, choreography and staging by Igor Kolb); the ballet won the BRAVO International Professional Music Award in the category Classical Performer from a Partner Country

2024 Pathétique Memory Book, project based on the pieces by Belarusian composers and documentary evidence of the tragedy and heroism of the Belarusian people during the Great Patriotic War (choreography); the production won the National Competition for the Best Cultural Project on a Patriotic Theme 2024 in the category Best Production on a Patriotic Theme

Eugene Onegin by Pyotr Tchaikovsky (choreography)

2025 DANSES Evening of One-Act Ballets: Boléro. Danse macabre. Carmen to the music of Maurice Ravel, Camille Saint-Saëns, and Georges Bizet (concept, libretto, choreography and staging)

The Nutcracker by Pyotr Tchaikovsky (libretto, choreography and staging)

In July 2024, with the company of the Bolshoi Theatre of Belarus, he appeared in a gala concert marking the 80th anniversary of the liberation of Belarus from the Nazi invaders and the 45th anniversary of the Nicaragua Revolution held at the Rubén Darío National Theatre in Managua, Nicaragua.