In 1926, Mickwitz became employed with the US Military Attaché office in Warsaw working with Major General William H. Colbern, Colonel R. I. McKenney, Colonel John Winslow, and General Emer Yeager. For thirteen years, she worked in Warsaw and then with the
Nazi invasion of Poland in December 1939, she transferred with the rest of the office to
The Hague,
Netherlands taking Lazareff with her as her "aunt". After only a few months, when the
Germans invaded the low countries, the office evacuated to Berlin for three months and then in August 1940 relocated to
Athens. Once again the
Germans followed and in July, 1941, Mickwitz and Lazareff fled to
Lisbon. With the assistance of former employers, she was able to secure
travel visas for the United States in March, 1942. Arriving in the U.S., Mickwitz began working for the War Department in the Military Intelligence Directorate translating German, Polish and Russian documents. In October 1946, when she was released from service, she was awarded the Meritorious Civilian Service Medal. That same month, she was hired by the
Army Security Agency and stationed at
Arlington Hall. In 1952, she was transferred to the National Security Agency (NSA) and founded a linguistic unit, which she managed to translate plaintext voice. She remained with the agency until 1963, when she retired, receiving a second Meritorious Service Award, but continued to consult with NSA until 1966. She was inducted into the
Cryptologic Hall of Honor in 2012. ==Personal notes==