She spent her twenty-six-year career employed by the State, at a time when women could only be public employees, working for the ministry of civil engineering.

[1] A member of the Čolak-Antić family, her father Paul was a Cavalry office, son of Duke Čolak-Anta Simeonović, a famed military commander of the First Serbian Uprising; Her mother Jelena was the sister of painter Milan Milovanović.

[1] She designed Elementary Schools for small villages around Serbia incorporating elements of local traditional architecture: Godacica (1923), Slatina (1924), Dugo Polje (1924), Gornji Matejevac (1925), Salaš Crnobarski (1926) and Viničko (1928) before moving to monumental buildings in Belgrade.

[3] In 1938 she was promoted head of the Department for public buildings and in 1940 she reached the highest position of inspector in the Ministry of Civil Engineering.

[2] Krstić also designed the embassies of the Kingdom of Yugoslavia in Buenos Aires and Ankara, where she stayed for some time, in 1941 she retired from state service.

[9] Milica Čolak-Antić Krstić lived at 7 Silvija Kranjčevića Street, in a house that she and her husband designed and built in 1937.

Throughout her life, she was active in various associations sharing and exchanging with her colleagues about ways to improve the living conditions of people.