He was born in Farsund as a son of consul Peter Ingvard Sundt (1841–1917) and his wife Anna Christiane Salvesen.
After Bjarne died in 1906, Vigleik took his younger brother Rolf on board as partner in the firm.
[5][6] He was a board member of Venstres Hus, the party-affiliated newspaper Dagbladet,[4] and the theatre Det Norske Teatret from 1925 to 1947 (chairman since 1935).
Other works include the biographical sketch of Povel Juel in Norsk biografisk leksikon as well as an unfinished monography about the same person.
In the business world, he was a board member of Bratsberg Bruk, Saudefaldene, Flørli Kraft- og Elektrosmelteverk and Laatefos; mostly hydroelectric power companies.