Born in a stonemason's family. 1909-1918 lived in exile in the United States. Graduated from Šiauliai Gymnasium. 1925-1929 He studied painting at Kaunas Art School. After 1929 expelled from school due to student strike. Soon, encouraged by Justins Vienožinskis and Juoz Mikėnas, he went to study in Paris.1929-1931 studied at the Paris Higher School of Applied and Decorative Arts (École Supérieure des Arts et Métiers). 1930-1931 attended the Modern Academy (Académie de l'Art Moderne). One of the teachers was the famous artist Aleksandra Ekster. For his diploma thesis, he chose the scenery and costume project for Sophocles' tragedy "Oedipus the King" and Shakespeare's drama "Othello".
in 1931 after returning to Lithuania he held his first personal exhibition in Kaunas and Šiauliai. The director of the State Theater Andrius Oleka-Žilinskas was interested in the scenography of S. Ušinskas and invited him to work in the theater. Since 1932 designed performances in drama, opera and ballet theaters. 1934-1940 He taught monumental painting (stained glass and scenography) at the Kaunas School of Art, from 1935. led a decorative painting studio.1940-1954 headed (intermittently) the Department of Monumental and Decorative Painting at the Kaunas State Institute of Applied and Decorative Arts and the Lithuanian SSR Institute of Art in Vilnius. in 1946 awarded the title of professor. 1955-1970 Kaunas Polytechnic Institute, since 1970. – Professor of the Vilnius Institute of Engineering Construction. in 1972 awarded with the state prize of the LSSR.He illustrated the performances of the State Theater, established a stained glass workshop in Kaunas, tested new technologies, created memorable historical, nationally themed stained glass windows, monumental panels and easel paintings.
Costume design for Bali's Sruoga play The Giant's Pounksme at the State Theater, 1934.in 1936 founded the first professional puppet theater in Lithuania, and in 1938 - the first sound puppet film in Lithuania "Storuli's Sapnas". in 1937 he was awarded a gold medal and a diploma for scenography sketches and puppets at the world exhibition in Paris. After leaving for half a year in the USA, in 1937 He held a personal exhibition in New York, created decorations and costumes, dolls, and the plafond "Music" for a couple of plays in the Broadway theater.
During the war and post-war period, he worked in the field of monumental art, especially stained glass and art glass. Since 1950 started scientific-technical experiments with stained glass, created a low temperature stained glass production system, was the first in Lithuania to start creating mirror and block stained glass. His stained glass windows decorated the Chamber of Commerce, Industry and Crafts (K. Donelaičio 8). During the Second World War - Šantių, Mažja of the Resurrection of Christ and other Lithuanian churches, later - public buildings in Moscow, Ukraine, Armenia.
Since 1968 until his death in 1974 had ceramics and art glass workshops in Kaunas, Baritoņu st. 6.