The CSA also took over some roles undertaken by the then-Infocomm Development of Authority (IDA) such as the Singapore Cyber Emergency Response Team (SingCERT), which facilitates the detection, resolution and prevention of security-related incidents on the Internet.

The agency builds upon the government's cyber security capabilities, which include strategy and policy development, cyber security operations, industry development and outreach; as well as public communications and engagement.

It has organised events such as the Singapore International Cyber Week (SICW) in 2016, with over 5,000 attendees from close to 50 countries.

In 2016, as part of Singapore's Cybersecurity Strategy, it was announced that internet access of civil servants' work stations will be cut-off.

[11] Security experts commented that the move may only raise the defense against cyber attacks slightly but risk damaging the productivity of civil servants and those working at more than four dozen statutory boards, and cutting them off from the people they serve.