The SDA is the first and only official coalition of opposition political parties in Singapore, founded with a mission to improve the way that political leaders serve Singaporeans.
The coalition was founded by former SPP chairman the late Mr Sin Kek Tong, former PKMS sec-gen Mohd Rahizan, former NSP sec-gen Mr Yip Yew Weng, SJP chairman Aminuddin bin Ami, and Dato Seri Desmond Lim Bak Chuan who was then the SPP assistant sec-gen.
Today, the SDA is led by
Dato Seri Desmond Lim Bak Chuan – an engineer and philantropist.