A SharePoint administrator is the person in an organization who is responsible for overseeing an installation of the Microsoft SharePoint collaboration and content management platform.
SharePoint administrator duties typically include installing, configuring and upgrading SharePoint systems, managing system operations and services, helping to train and support business users on SharePoint usage and backing up SharePoint data. In some cases, a SharePoint administrator may also oversee the SQL Server database that supports Sharepoint.
A SharePoint administrator might be responsible for managing a single system or a SharePoint farm consisting of multiple servers. Depending on the organization, one person or a team of people may be responsible for carrying out administrative duties.