Unusually, Sveistrup was not a professional singer; he was a teacher for autistic children.
Jakob then went on to compete in the Dansk Melodi Grand Prix, which took place at the Forum in Horsens on 12 February 2005.
He was selected as winner of the competition by national telephone voting for his performance of the song "Tænder på dig" by Jacob Launbjerg & Andreas Mørck.
He was a guest performer at Congratulations, the 50th anniversary Eurovision concert in Copenhagen, Denmark, in October 2005.
He released his sixth album in November 2015, entitled 10: Back to Beginning.