Zoja Dumengjić was the first woman to graduate in architecture from the Faculty of Technology in Zagreb in 1927. From 1928 to 1930, she worked at the office of the architect I. Fischer. In 1930 Dumengjić became a state administrator (kontraktualni državni činovnik) at the Institute for Hygiene at the School for Public Health, in the sanitary and technical department. In addition, Dumengjić worked on numerous competitions with her husband Selimir Dumengjić, whom she had met during her studies. In 1941, Zoja Dumengjić was dismissed from the previous position, but shortly after was hired by the State Medicine Production Institute (Državni Zavod za Proizvodnju Lijekova) as a private architect. From 1945 onwards, she worked at the Department of Medical Technology. In 1947, Zoja Dumengjić became the head of the Department for the Construction of Health Facilities. A year later she was transferred to the APZ – Arhitektonsko projektni zavod (Architectural Design Institute) in Zagreb, where she remained until 1955 as an independent designer and manager. In 1950, Zoja Dumengjić had the chance to travel to Switzerland for training in designing hospitals. After APZ split into thirteen separate studios, Zoja and Selimir Dumengjić founded their own architectural office ‘Dumengjić’, where Zoja worked until she retired in 1975.