Socializing with young workers and students, he became acquainted with the ideas of the labor movement and in June 1940 became a member of the Communist Party of Yugoslavia (CPY).

[4] After the April War and the occupation of the Kingdom of Yugoslavia in 1941, Matić, as secretary of the Local Committee, and then secretary of the CPY District Committee for Irig and a member of the Uprising Preparation Staff, worked very actively to organize the Srem uprising in August 1941, he was in charge of receiving communist prisoners who had escaped from the Sremska Mitrovica prison.

In the battles of this brigade with the Germans on Fruška Gora on 17 July 1944, he was wounded in the chest and was soon transferred to Italy for treatment.

Upon his return to the country, he was appointed commander of the Srem Operational Zone at the General Staff of the NOV and PO Vojvodina.

[citation needed] After the liberation of Belgrade in November 1944, he was sent to study in the Soviet Union, where in 1945 he graduated from the K. Е. Voroshilov Higher Military Academy.

[citation needed] Matić was elected a member of the Central Committee of the 8th Congress of the League of Communists of Yugoslavia.

In the spring of 1988, he was elected president of the Federal Board of SUBNOR (vetarns' union), and in October of the same year he was removed due to a conflict with the leadership of the Socialist Republic of Serbia.