The JGS members come from a diverse set of backgrounds, including civil engineering, architecture, agricultural civil engineering, geology, and natural resources. The members are engineers, researchers, students, corporations and groups. There are currently more than 8,000 individual regular and student , and there are more than 850 corporate members.
| Consultants | 45 % |
| Construction companies | 20 % |
| Schools (Academic staffs and students) | 12 % |
| Public organizations | 8 % |
| Others | 15 % |
(As of September 2013)