It is a great honour to have a high profile leader as high as Bapak Rana. Not only he was the founding father of our group companies, he was also the founding father of several professional associations and NGOs, such as Green Building Council Indonesia (GBCI); Ikatan Ahli Bangunan Hijau Indonesia (IABHI); American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) - Indonesia Chapter; and Indonesia Society for Energy Conservation and Efficiency (MASKEEI).