A processing device receives a request to include a custom action in a processing definition. The custom action is to be performed in response to an occurrence of an infrastructure event in a third party infrastructure platform. The processing device selects the processing definition that specifies a default action to be performed in response to the occurrence of the infrastructure event. The default action being defined by an infrastructure management platform managing the third party infrastructure platform. The processing device receives, from the third party infrastructure platform, user input defining the custom action relative to the default action in the processing definition and changes the processing definition to include the custom action relative to the action.