He was born in KjøpsvikTysfjord. He grew up in Hamarøyand resided in Svolvær from Berntsen founded the Svolvær folk song club Lovisa inand the Hamarøy music festival Troilltampen in Among his best known songs is the svolvær single song "Kor e hammaren, Edvard" fromwith text by Jahn Arill Skogholt, on the population decline of Northern Norway.
The album contained sixteen songs, some of which had political texts. The album Ongan i Lofoten from contained songs for children, and was a cooperation with the Cirani orchestra. His album I ly av Lofotveggen from contained self-written material, and svolvær single songs based on Petter Dass ' poems "En smuk Aftensang" and "Den nordlandske torsk".
In he issued an album with texts for children, Lilla Bolla Bølla og andre boller. Among his other songs are "Moltebærvisa" and "Badestrandsballade for korpulente".
Det e lys lenger frem was issued inand Sol bakom skyan was published in In he published Ongan i Lofoten, in came the songbook Lille Bolla Bølla, and his book Sanga i søkk og kav was svolvær single in Ina cultural prize, Jack Berntsens kulturpris, was established by the municipality Vågan.