Soloist and chamber musician, cello concertmaster of the Grand Theatre – National Opera Orchestra. Born in 1989 in Warsaw, he began learning the cello at the age of eight with Michał Nyżnyk, followed by Roman Hoffmann in 2005–8. In 2011 he obtained a BA Hons. from the Feliks Nowowiejski Music Academy in Bydgoszcz in the class of Andrzej Bauer and Bartosz Koziak, followed by a MA Hons. from the Fryderyk Chopin University of Music in Warsaw in the class of Andrzej Bauer. He has participated in masterclasses notably with Kazimierz Michalik, Andrzej Orkisz, Stanisław Firlej, Claus Reichardt, Michael Flaksman, and Alexander Neustroev. 

As a soloist, he has appeared notably with the Warsaw Philharmonic Orchestra, Polish Radio Orchestra, Slovakian Radio, Sinfonia Iuventus, Gorzów Philharmonic, Opole Philharmonic, AUKSO Chamber Orchestra, under conductors such as Marek Pijarowski, Rastislav Štúr, Marek Moś, Kai Bumann, Wojciech Semerau-Siemianowski, Rafał Janiak, and Rafał Kłoczko. 

He is also active as a chamber musician. In 2011–14 he played in duo with pianist Paweł Arendt. In 2013, with Joanna Krefts (violin) and Bartłomiej Wezner (piano), he founded the Herbert Piano Trio, which cooperated with the Zbigniew Herbert Foundation and was a semifinalist at chamber music competitions in Weimar and Trieste. Dominik Płociński is also a member of the Warsaw CELLONET Group and Hashtag Ensemble, ensembles specializing in contemporary music performance, regularly invited to leading music festivals such as Warsaw Autumn, Premiers in Lviv, Kody in Lublin, Poznań Music Spring, and Premieres Festival in Katowice.

He has won awards at several national and international competitions, including New Talent in Bratislava (2014), Witold Lutosławski Cello Competition in Warsaw, David Popper Cello Competition in Várpalota, Kazimierz Wiłkomirski Youth Cello Competition in Poznań, Bach Competition in Zielona Góra. In 2013, he won the Polish Minister of Culture Award, appearing at the Concert of the Year with the best graduates of Polish music academies. He held the Young Poland scholarship in 2016. 

He has recorded for the Polish Radio as well as DUX, Art House, Requiem Records, and Acte Préalable labels.