How do I Allow Any Employee to Add Skills to Another Employee’s Profile?

You enable the option Allow nonlibrary skills in Skills Center and Team Skills Center in Skills Settings (My Client Groups > Skills Settings).

By disallowing this feature, only employees will be allowed to add skills to their own talent profile using Skills Center. Conversely allowing this feature, will allow anyone to add skills to another employees’ profile without the employee knowing this has happened. The impact on the application of disallowing non self-additions is that coworkers accessing the Skills Center of someone otherwise, can't see and select to add skills from the skill suggestion, can't view the Add buttons above the two Skills in development or Skills attained groups.