A TYPO3 integrator develops the template for a website, selects, imports, installs and configures extensions and sets up access rights and permissions for editors and other backend users. An integrator usually has “administrator” access to the TYPO3 system, should have a good knowledge of the general architecture of TYPO3 (frontend, backend, extensions, TypoScript, TSconfig, etc.) and should be able to configure a TYPO3 system properly and securely.
Integrators know how to use the Install Tool, the meaning of configurations in “typo3conf/LocalConfiguration.php” and the basic structure of files and directories used by TYPO3.
The installation of TYPO3 on a web server or the configuration of the server itself is not part of an integrator’s duties (but of a system administrator, see above). An integrator does not develop extensions but should have basic programming skills and database knowledge.
The TYPO3 integrator knows how to configure a TYPO3 system, handed over from a system administrator after the installation. An integrator usually consults and trains editors (end-users of the system, e.g. a client) and works closely together with system administrators.
The role of a TYPO3 integrator often overlaps with a system administrator and often one person is in both roles.