Widarto is the President Commissioner of PT Budi Acid Jaya Tbk, President Director of PT Tunas Baru Lampung Tbk and Chairman of the Sungai Budi Group, whose main focus is in the export of black pepper and also other commodities such as coffee beans, tapioca starch, rice flour, pineapple canning, citric acid, palm oil, coconut oil, and natural rubber sheets.