Employee and candidate profiles are equipped with a "View Change History" feature that lets you see who changed a profile's attributes.
This function can be accessed by clicking the "Add Tab" button, and then selecting "View Change History."
The window that opens will show all changes* to that particular profile including who made the change, which attribute was changed, the old value, the new value, and the date.
* Note that the changes that show in this window will be those made after April 25th, 2020. All changes made previously will appear in the Notes section of the profile.