He was born in Tjeldsund Municipality as the son of coastal pilot Berg Sæther (1876–1948) and wife Magna Toresen (1881–1952).
[1] In 1943 he married Gudrun Jackobsen (1907–1994) and they had one son, Tor Arne Berg-Sæther (1946–2006) and one daughter, Bente Ramsvik (1948-).
After the war he was hired in the Ministry of Local Government and Labour,[1] where he was in charge of integrating refugees from Finnmark from 1946 to 1952.
He was a member of the National Postal Advisory Board (1978–1986) and vice chair of Niingen Kraftlag (1980–1990).
[1] He held the Office manager and CFO positions at Trondenes Kraftverk and Sør-Troms Elforsyning A/S power companies for 32 years (1954–1986).