Sivert Heltne Nilsen (born 2 October 1991) is a Norwegian footballer who plays as a midfielder for Scottish Premiership club Aberdeen.
He has previously played for IL Hødd, Vålerenga Fotball, SK Brann, AC Horsens, IF Elfsborg and Waasland-Beveren and has represented his country at youth level.
Heltne Nilsen started his professional career at Norwegian Second Division side IL Hødd.
[4] In July 2018, Heltne Nilsen moved to Danish Superliga side AC Horsens.
[7] In 2024, he reunited with former manager Jimmy Thelin at the latter's new club, Aberdeen, in the Scottish Premiership.