You can access MyGiant using the email address and password that were emailed to you when you were accepted to College of the Sequoias.
If you do not have those emails you can contact the Welcome Center on the Visalia campus, the Hub at the Hanford campus, or the Student Services counter at the Tulare campus.
If you have forgotten your password, you are able to reset your password using the "Forgot Password" feature at https://mygiant.cos.edu
