After coming back in 1919, he became interested in management and continued his studies at the Illinois Institute of Technology.
Until 1935 he worked as a consultant and helped to establish large companies in Barcelona, Brussels, Copenhagen, London, and Milan.
He also lectured at the Vytautas Magnus University and was awarded the Commander's Cross of the Order of the Lithuanian Grand Duke Gediminas.
During World War II Graičiūnas decided to remain in Lithuania despite clear threats of the occupation by the Soviet Union.
After this incident, Graičiūnas and his wife were arrested for espionage and anti-Soviet activities, and were tried and sentenced to several years in a gulag.