(Update: Some of the links dont work anymore because the application have closed. Take this as an indication that applications for summer internships in Summer 2020 open in May 2019 and close by End June 2019.
GIC (Summer 2020)
Apply via GIC Website:
Uniglo Global Internship (Fast Retailing)
Closing Date: 31 August 2019
Dyson, Business Intelligence Intern (GradSingapore)
Closing Date: 13 September 2019
Application starts in May