Geir Øystein Lysne (born 9 October 1965 in Trondheim, Norway) is a Norwegian jazz musician (saxophone, flute, composer, arranger) and a famous Big Band leader.

Lysne is internationally well known on the big band, wind ensemble, and partly on the classical orchestra scene.

Besides this Lysne has done hundreds of productions with twenty top professional European ensembles and radio jazz orchestras like HR big band, DR big band, DR vocal ensemble, 12 celli der Berlin Phil, UMO big band, Aarhus Jazz Orchestra, and all five Norwegian military orchestras.

[3] Lysne's compositions have been played on the radio and TV in more than 30 countries, and he has also received coverage from many publications including Die Welt, Jazz Podium, Deutschlandfunk, and 3sat.

He regularly works with other artists, and has been conductor/director on tour with Bobby McFerrin, Joe Lovano, Stefano Bollani, Mory Kanté, and Nils Landgren.