| Ong Seng Keat | Certificate In Legal Practice (CLP) |
| Ong Seow Horng | Certificate In Legal Practice (CLP) |
| Ong Sern Tai | Lincoln's Inn |
| Ong Shau Qin | Certificate In Legal Practice (CLP) |
| Ong Sheau Teng | Certificate In Legal Practice (CLP) |
| Ong Shi Theng | Certificate In Legal Practice (CLP) |
| Ong Shi Tong | Middle Temple |
| Ong Shu Cing | Multimedia University (MMU) |
| Ong Si-Oui Serene | Inner Temple |
| Ong Siang Ying | Certificate In Legal Practice (CLP) |
| Ong Siew Ming | Certificate In Legal Practice (CLP) |
| Ong Siew Swan | Bond University, Queensland |
| Ong Siew Wan | Lincoln's Inn |
| Ong Siew Yin | Certificate In Legal Practice (CLP) |
| Ong Sim Hooi | Certificate In Legal Practice (CLP) |
| Ong Sin Ling | Certificate In Legal Practice (CLP) |
| Ong Sin Yue | Certificate In Legal Practice (CLP) |
| Ong Siok Mei | Certificate In Legal Practice (CLP) |
| Ong Soo Lee | Lincoln's Inn |
| Ong Su-Yin | Certificate In Legal Practice (CLP) |