If you have a public Handshake Profile, Employers will be able to review your profile on Handshake. You can see the Employers who have viewed your profile by scrolling down to the section "Who's Viewed My Profile", towards the left of your profile page:
This is only visibly to you and not shown to other employers when they view your profile. You can click on this section to view more employers that have viewed your profile. Up to the 200 most recent employers will be displayed.