Enter preferred shell when you cannot change the default shell

Enter preferred shell when you cannot change the default shell

In my production environment, my default shell is an old version of csh and I cannot change it. How can I correctly login to my preferred shell? In particular, I would like to use bash. However the system bash is also very old so I compiled a newer version in ~/bin. The perfect scenario will be, I am using ~/bin/bash after login (e.g., ssh).