Born in Solo. Education: SLA, Faculty of Economics, Gajah Mada University (incomplete). This RRI Yogyakarta employee (1955-1958) started playing films in Ke Kota (1959), after moving to Jakarta. Increasingly famous after joining the Kwartet Jaya led by Bing Slamet (1927-1974). Together with Bing Slamet, Eddy Sud and Ateng became permanent employees at PT. Sinar Sakti Film Safari. After Bing Slamet died, Kwartet Jaya disbanded. Iskak and Ateng left PT. Safari, and play in films produced by PT. Neat film. Among others, Ateng Bikin Dizzy (1977), Ateng Pendekar Odd (1977) and Dang Ding Dong (1978). Starting in June 1981, he appeared on the Ria Jenaka program aired by TVRI. Together with Ateng (Bagong), Gareng played by Slamet Harto and Sampan Hismanto (Semar), Iskak has been Petruk in the event for more than 15 years. His last appearance on the big screen was through Weasel Bearded (1983).