Sikora's engagements for the 2026/27 season include Ismaele Nabucco at Festival Granda in Peru; Alfredo La traviata at Sofia Opera and Ballet in Bulgaria; and Lensky Eugene Onegin, Lykov The Tsar’s Bride, Levko May Night, and Don Juan in Dargomyzhsky’s The Stone Guest at the Bolshoi Theatre. He also appears as Rodolfo La bohème at the Mikhailovsky Theatre in St Petersburg.

Past engagements include Alfredo La traviata, Rodolfo La bohème, Cassio Otello, Andrei Khovansky Khovanshchina, and Anatol Kuragin War and Peace at the Bolshoi Theatre, among others.

A First Prize winner at the 2026 Elena Obraztsova International Competition, Kirill was a member of the Bolshoi Theatre Young Artist Program. In 2024, he completed his studies at the Russian Institute of Theatre Arts (GITIS), earning a degree in Musical Theatre Performance.