Ulf Isak Leirstein

Ulf Isak Leirstein (born 30 June 1973) is a Norwegian politician, formerly for the Progress Party and then independent, and a member of the Storting from 2005 to 2021. He left the party after it was revealed that he had sent pornographic pictures to a mailing list belonging to the Progress Party's youth wing.

Biography Leirstein was born in Sarpsborg. He was a member of the Moss municipal council from 1991 to 2007, and from 1995 to 2007 simultaneously of the Østfold county council. He was chairman of the Progress Party's Youth from 1994 to 1995, and served as deputy mayor of Moss from 1999 to 2003.

From 1996 to 2003, he worked as project leader at Standards Norway (formerly Norwegian Technology Centre). He was the leader of the School Committee of Moss from 1995 to 2003, and lay judge of the Moss District Court from 1995 to 2005. He has held board positions in several organisations and businesses, and has been a board member of the Port of Moss since 2015. He was a member of the Progress Party's central board from 2003 until 2011. It was also revealed that Leirstein had discussed inviting another underage member of Progress Party's Youth to a threesome with a female member of the Progress Party.

He would continue in Parliament throughout his term to 2021, moving over to the Standing Committee on Scrutiny and Constitutional Affairs. He resigned his party membership on 26 April 2019, continuing as an independent.