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:                          Mr. HE, Ruifei  
External Vice-Chairperson: Ms. LIU, Yiyang         
Internal Vice-Chairperson:  Mr. ZHAO, Huibin
Financial Secretary:              Ms. FENG, Yueman
Publication & Publicity Secretary: Mr. XU, Xiaoyu
Social Secretary:                   Mr. YUN, Yu