Before her marriage, she worked for a time at the Royal Swedish Library. After moving to Gothenburg, she became an active member of the Liberal Party's Women's Association, soon becoming its secretary. From 1947 to 1952, she chaired the Gothenburg branch of the influential women's rights organization Fredrika Bremer Association where she was successful in establishing lasting relationships with women's organizations in the other Nordic countries.[2]
In the late 1950s, when Asta Ekenvall and Rosa Malmström were planning to create a historical archive of women's literature, they invited Pineus to join them as an influential women's rights activist. In 1958, the three established the early research archive which formed a basis for women's studies. Ekenvall was chair, Malström the archivist and Pineus, secretary. In 1971, it was transferred Gothenburg University Library where it was known as Kvinnohistoriska Samlingarna (Women's Literature Collection), now simplified to KvinnSam.[1][4] It was thanks to Pineus' skillful fundraising that the archive was able to continue development until a post of archive librarian at the university library was created in 1971.[1]
Pineus was also active in the art sphere, serving on the board of Gothenburg University's School of Arts, Crafts and Design (1947–1967), on that of the art association Spiran [sv] (1955–1967) and chairing the Friends of Röhsska Museum (1961–1972).[2]
Eva Pineus died in Gothenburg on 9 March 1985 and is buried in the city's Kviberg Cemetery.[1]
