This is but a series of collated links and information, specific to SoC.
NUS job portal.
NUS Talent Connect
NUS SoC Advanced Technology Attachment Programme
NUS ATAP Information Website
Sourcing your own internships? Its possible! Besides finding your own from connections, here are some other internship portals that is available!
InternSg: Singapore Internships
VentureLoop: Venture-backed companies