Esther Kostøl worked for the Norwegian Civil Servants’ Association (Norsk Tjenestemannslag) in 1977 and in the period 1978-1985, she worked for the Civil Servants’ Cartel (Statstjenestemannskartellet). She was Secretary of the Norwegian Confederation of Trade Unions in 1985-1989, its Deputy Chairman in 1989-1997.
Esther Kostøl was a member of the Norwegian Nobel Committee in 1997.
The biographical sketches of the Norwegian Nobel Committee members were written by Sølvi Glendrange and edited by Øyvind Tønnesson. They are based on the following sources:
– Norsk Biografisk Leksikon (Norwegian Biographical Encyclopaedia), Oslo 1923-1983
– Hvem er Hvem? (The Norwegian “Who’s Who”), several editions
– Aschehoug og Gyldendals Store Norske Leksikon (The Norwegian National Encyclopaedia), Kunnskapsforlaget, 2nd and 3rd edition, Oslo 1989/1995-1999
– Kunnskapsforlagets Nettleksikon (the Web Encyclopedia of Kunnskapsforlaget, www.kunnskapsforlaget.no), Oslo 1999