Thomas Sejthen is a Danish jazz bassist based in Aarhus who has spent well over a decade as a fixture of the Danish jazz scene. He has performed with groups such as Uffe Steen Trio, Indra, Admiral Awesome and Morten Haugshøj Group, and has led his own trio since 2016. His career includes several Danish Music Award nominations, a DMA win for his work with singer Indra, a US Grammy nomination, and collaborations with international jazz names like John Scofield and Jeff "Tain" Watts.
Thomas Sejthen participates in a church jazz concert with Jakob Sørensen and Malthe Mølle Nørgaard, exploring the meeting between jazz and church music.
Sejthen released the single 'The Christmas Song' in 2025.
Together with guitarist Uffe Steen, Sejthen continues the tradition of Christmas concerts in their duo, which achieved great success with previous shows.
