Zweizz is the primary performing alias of Norwegian musician and composer Svein Egil Hatlevik (born May 27, 1977).

Hatlevik started using the Zweizz alias in 2003 after leaving the Norwegian black metal group Dødheimsgard.

The first Zweizz release was the 7-inch EP Black Necrotic Obfuscation, issued through Vendlus Records in 2004.

On March 24, 2007, Zweizz released his debut album The Yawn of the New Age, also through Vendlus Records.

Later the same year Epicene Sound Systems released an untitled Zweizz cassette EP in a limited quantity of 30 copies.