As a son of Polish/Ukranian refugees, Lars Seniuk (*1989) grew up just outside of Hamburg. After classical trumpet training with Prof. Hans-Jörg Packeiser and attending jazz trumpet studies at the university parallel to high school, he studied jazz trumpet, jazz composition, classical composition and contemporary classical music in Berlin and Hamburg. He was a member of the Youth Jazz Orchestras of the German States Hamburg and Schleswig-Holstein and became a member of the National German Jazz Orchestra (BuJazzO) at age 17. As a trumpet player, he played with the NDR Bigband, the Global Music Orchestra, Jazz Kollektiv Berlin as well as with a variety of his own projects, ranging from traditional jazz over bebop to avantgarde with influences from microtonal and contemporary classical music.

Lars Seniuk has been touring Germany, different European countries, China and the US (as awardee of the International Made In New York Jazz Competition).

In 2005, at the age of 16, Lars Seniuk founded his first own big band. He serves as leader and conductor of the New German Art Orchestra, whos members come together from all corners of Germany and with which he released his album "Pendulum" in 2015, that got glowing reviews ("a gripping listening pleasure", Jazz Podium; "modern bigband jazz on its highest level", SWR) and was nominated for the ECHO (German Jazz award) as big band album of the year.
Lars Seniuk also frequently works with the German radio big bands - the Frankfurt Radio Big Band, the NDR Bigband in Hamburg and the WDR Big Band Cologne.

Being referred to as a "high flyer" (Hessischer Rundfunk, SWR) and a "jack-of-all-trades" (Deutschlandfunk) he served as a leader of the National Youth State Jazz Orchestra of Hamburgfrom 2014 til 2020, that during this period developed into one of the leading selected orchestras throughout Europe and won the International Big Band Competition in the Netherlands in 2019.

After having taught at the University of Music and Theater in Hamburg Lars Seniuk started teaching at the Universities of Music in Frankfurt (arrangement and bigband conducting) and Weimar (jazz trumpet). He also got appointed Professor of jazz trumpet, ensemble and big band as well as head of the jazz programme at Music And Arts University Vienna in 2019. Furthermore he teaches professional musicians in Germany and Austria, e.g. brass umpet players from renowned philharmonic orchestras, gives masterclasses throughout Europe and is known to be one of the leading experts on fixing brass players' embouchure and techinque problems.

In 2015 Lars Seniuk founded the non-profit organizsation Miteinander durch Musik e.V.("together through music"), that supports refugees in a number of projects throughout Germany. From 2017 to 2021 he also served as head of the Jazzbuero Hamburg, umbrella organization of jazz in Hamburg, and founded the "Working Group Jazz & Gender" in 2018 in order to find solutions for the low number of female jazz instrumentalists and to break up gender roles and clichés.

Lars Seniuk has been awarded scholarships from the Claussen-Simon-Stiftung, Senat of Berlin, Cultur Foundation of Saxony and the federal German Initiative Musik among others.