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.