After passing from the school, he migrated to Surabaya, and studied in the Centrale Burgerlijke Ziekenhuis (transl.

He was released after the independence of Indonesia, and he went to South Maluku to participate in the guerrilla against the oncoming Dutch forces as a health staff.

After being released, Karubuy joined the "Indonesian Tigers" forces, commanded by Robert Wolter Mongisidi, against Raymond Westerling.

[5] In 1962, he was sent to New York City as part of the Indonesian delegation led by Subandrio alongside other Papuan representatives which include J.A.

Dimara, Silas Papare, Frits Kirihio, M. Indey, and Efraim Somisu,[6] which culminated with the New York Agreement.