Studied law at the University of Rome from 1944 to 1948. In 1943 he joined the Lithuanian Envoy to the Apostolic See, became its Counsellor in 1944, First Secretary in 1964, and Representative of Lithuania from 1970-1991. From 1983 he additionally served as Counsellor of the Lithuanian Embassy to the USA, and from 1987 as Chargé d'Affaires and Envoy of Lithuania.
Stasys Lozoraitis was active in raising the issue of the restoration of Lithuania's independence, took part in various conferences, and contributed to publications such as "Europos lietuvis", "Santarvė", and the Italian press. In 1946-1948 he worked in the editorial office of the newspaper "Lithuanian Voice". He participated in the activities of Italian Lithuanians: he was the chairman of the Central Lithuanian Committee (1950) and the Temporary Organising Committee of the Italian Lithuanian Community (1950-1952). He was also active in the International Union of Exiled Intellectuals.
1 March 1990. In March 1990, in Lithuania, he was granted the rank of Special Envoy. He participated in the restoration and international consolidation of Lithuania's independence by providing information and suggestions to the leadership of the Sąjūdis and the Republic of Lithuania, sending instructions (pro memoria) to officials of the Lithuanian diplomatic service, diplomatic letters to members of many governments, and by strengthening relations between the Lithuanian population and the diaspora. In October 1991, he became Ambassador Extraordinary and Plenipotentiary of the Republic of Lithuania to the USA. In 1993, he was a candidate for the office of President of the Republic of Lithuania. 1993-1994 - Ambassador Extraordinary and Plenipotentiary of Lithuania to Italy. He died on 13 June 1994 in Washington DC. Buried in Putnam, USA. Reburied in 1999 in Kaunas, Petrašiūnai Cemetery.
