Wijeysingha has stated that he joined the SDP because he realised he had a responsibility as a Singaporean to work for change, saying that: "I cannot look the other way as more and more people experience the adverse effects of current PAP policies.

[6] Just days before Nomination Day on 27 April 2011, the PAP team in the Holland-Bukit Timah Group Representation Constituency (GRC) led by Vivian Balakrishnan, told the press that the SDP was "suppressing" a video which would "raise some awkward questions" about the party's agenda.

Wijeysingha's response was that he was unsure about which video Balakrishnan was referring to and that the SDP was "an open party".

(in reference to Wijeysingha and comments he had made on the video, which was recorded at a forum discussing gay rights in Singapore).

[12] In August 2013, Wijeysingha announced that he was resigning from the SDP, stating that he wished to focus his efforts on pursuing his work in civil society.