G20, Indonesia and the Quest for Parameters of Sustainable Infrastructure Indonesia has been an active member of G20 since the forum’s inception in 1999. After the ministerial forum was upgraded to be a leader forum in 2008, Indonesian Presidents never missed the summits. Despite their tight domestic affairs schedules both former President Susilo Bambang Yudhoyono and the current President Joko Widodo have been in regular attendance at all summit meetings. By Yulius Purwadi Hermawan