She took the business over in 1935, changing its name first to Firma Agda Österberg and later to Tre Bäcker, producing thousands of church textiles up to the 1970s.
When she was 18, she was allowed to attend the Althin Painting School which led to evening classes at the Technical College.
[1] From 1915 to 1921, she also worked as a ceramist for S:t Eriks Lervarufabriker [sv] in Uppsala, designing everyday items including tableware.
[1] In 1933, Österberg was appointed artistic director of Axevalla-Varnhem Slöjd in Varnhem, a firm which produced rugs.
Of particular note was the embroidery Johannes uppenbarelse (Apocalypse of John) which was presented at the 1937 Paris World Fair.