PT. Guna Indah Makmur is one of the largest companies in the field of Gas Engineering Consultants in Indonesia. The company was founded in 1998 whose founder is Mr. Johanes siem. until 2012 PT. Guna Indah Makmur has 64 branches in major cities in Indonesia and has the 6 People General Manager, to support government programs in terms of convertion Petroleum to LPG. So for 2012 we will open 33 branches ( 14 Offices in Java, 6 Office on the island of Sumatra, 5 Offices on the island of Borneo, 3 Offices on the island of Nusa Tenggara, 4 Office in JABOTABEK, and will continue to grow.