Indonesian citizen born in Pati on July 22, 1969. Adi Lumakso earned a Bachelor of Civil Engineering degree from Diponegoro University in 1989, a Master of Business Management from Universitas Tenaga Nasional Malaysia in 2005.

Appointed as Director of Sumatra and Kalimantan Region of PT. PLN (Persero) based on the Decree of the Minister of SOEs as the General Meeting of Shareholders Number SK-392/MBU/12/2021 dated December 7, 2021. And appointed as Director of Generation Management of PT PLN (Persero) on September 21, 2022 based on the Decree of the Minister of BUMN as the General Meeting of Shareholders Number SK-213/MBU/09/2022.

Adi Lumakso is an Engineer who has spent more than 27 years of his career at PT PLN (Persero). Pioneering his early career in the Project field in Sumatra and Kalimantan, until finally he was given the mandate as General Manager of Main Development Unit (UIP) X in 2013, then became General Manager of Main Development Unit (UIP) V in 2015. Subsequently appointed as Head Construction Administration Division at the Procurement Directorate of PT PLN (Persero) Head Office in 2015, and most recently served as Head of the Sumatra Regional Construction Division at the Sumatra Regional Business Directorate of PT PLN (Persero) Head Office in 2017.