Poltavsky has also appeared as a soloist with chamber ensembles at various festivals in Russia and abroad, among them December Evenings, Ars Longa, Homecoming, Viva Cello and the Vladimir Martynov Festival (Moscow), Diaghilev Seasons (Perm), Music Days (Montenegro, Kaštel Novi), Novosadsko Muzičko Leto (Serbia) and Art November.
The musician’s circle of interests is incredibly broad and varied, ranging from baroque music for the viola d’amore to works by Vladimir Martynov, Georgs Pelēcis, Sergei Zagny, Pavel Karmanov, Dmitri Kourliandski and Boris Filanovsky. Poltavsky has worked with ensembles including the Academy of Early Music, Opus Posth and the Ensemble of Contemporary Music. In November 2011 he took part in the Sofia Gubaidulina Festival at which he performed the Russian premiere of the piece Two Paths at the Great Hall of the Moscow Conservatoire.
Poltavsky has appeared with orchestras including The New Russia ensemble, the State Chamber Orchestra of Russia, the State Academic Symphony Orchestra of Russia, the Moscow Soloists, Musica Aeterna and The Seasons. In chamber ensembles, he has collaborated with Tatiana Grindenko, Vladimir Spivakov, Alexei Lyubimov, Alexei Goribol, Polina Osetinskaya, Maxim Rysanov, Julian Rachlin, Alena Baeva, Elena Revich, Alexander Sitkovetsky, Roman Mints, Boris Andrianov, Alexandre Bouzlov, Andrei Korobeinikov, Valentin Uryupin, Nikita Borisoglebsky, Gaik Kazazian, Alexander Trostyansky and Rodion Zamuruev among others.