Applies: SharePoint 2013 and Project Server 2013 Administrators
So you logged into SharePoint Central Admin and noticed that the ‘Manage services on server’ link is missing from System Settings and Application Management > Service Applications
The reason is that you are not running Internet Explorer with Administrative Rights. Simply, right click on IE and select ‘RUN AS ADMINISTRATOR’ and voila!! the link appears.
I personally launch SharePoint Central Administrator in Administrative Mode each time I administer SharePoint/Project Server.
Hope this helps!