Gotianun made a living from salvaging ships at the end of the Second World War. Several years later, he became involved in an automobile dealership. Later, in 1955, he founded Filinvest Development Corporation a company which became engaged in real estate in 1967. Gotaniun and his wife, Mercedes, temporarily retired from business activities in the 1980s but returned a short time later, with a plan to make improvements to the corporation. He is among those honored at the BizNewAsia Real Estate Who is Who (BREW) awards.