Tomasz Siarkiewicz performed as well as a member of I, Culture Orchestra, Hanza Chamber Orchestra and Stanisław Moniuszko Academy of Music Symphony Orchestra. During his studies he started working in Elbląska Orkiestra Kameralna (Elbląg Chamber Orchestra) in which he worked until January 2015. The orchestra has released two albums so far: Elbląska Orkiestra Kameralna & Łukasz Długosz (Dux 2011), Elbląska Orkiestra Kameralna & Ryszard Rynkowski (EMI Music Poland 2012). Tomasz won his first violin competition the age of 11. During his studies he became a laureate and a prizewinner of many violin competitions and festivals in Poland. In 2005 he co-funded two different music bands: Milonga Baltica and Klezmoret Trio. Milonga Baltica (bandoneon, violin, piano, double bass) specializes in performing argentine tango – milonga. Klezmoret Trio (violin, accordeon, double bass) specializes in Jewish and Slavic folk music. From the very beginning both bands have been performing in many festivals in Europe (Poland, Lithuania, Denmark and United Kingdom). In 2008 Klezmoret Trio released their first album „Klezmoret Trio” (Polonia Records 2008). A few years later, Milonga Baltica released an album called "Tango" (Radio Gdańsk 2013). Both bands performed numerous times with chamber orchestras and well-known artists such as: Kroke Band or Carlos Barrionuevo & Mayte Valdes. Through all these years that he has been working in the Elbląg Chamber Orchestra he had a chance to work and learn from the best conductors, soloists and composers from all around the world