Founded in 2007, the Postgraduate Students' Association (PGSA) represents the St. Johanians in Wong Chik Ting Hall which is the Postgraduate Wing.

Apart from organising events for postgraduate students, they also collaborate with SJCSA to promote integration between the two cohorts.

Executive Members:
Chairperson:                                       Ms. SHI Zhengyu
External Vice-Chairperson:              Ms. HUANG Jiawen          
Internal Vice-Chairperson:               Ms. ZHOU Xinbei
Financial Secretary:                           Ms. GAO Huizhi
Publication & Publicity Secretary:   Mr. SHEN Zijing
Social Secretary:                                Ms. CHEN Xinhui

Non-Executive Members:
Ms. MO Charlene
Ms. SHI Jian
Mr. HARDY-LACHANCE Thierry
Ms. SHI Jingjing
Mr. HUANG Long