Abstract: Apparatus and methods for expanding a data transfer framework are disclosed. Exemplary implementations may: provide an ETL framework comprising a plurality of ETL modules and comprising code including variables; obtain a configuration file including data values to replace the variables for executing selected ETL modules, and including external command data configured to execute a new data transformation external to and absent from the ETL framework, the external command data including a reference to an external module generated in relation to an external interface; and execute the one or more selected ETL modules based on the code, the data values and the external command data. Exemplary implementations provide a flexible and expandable ETL framework that enable a new type of data transformation that is not currently supported by the framework, without having to modify the framework. The framework may impart native properties and characteristics of the framework to the external module.