Aspects of the disclosure relate to multicomputer processing of client device request data with centralized event orchestration. A computing platform may receive, from a client computing device, event definition information defining an event. Subsequently, the computing platform may receive, from a recipient computing device associated with the event, a request for a delivery selection user interface. The computing platform may send the delivery selection user interface to the recipient computing device and may receive, from the recipient computing device, delivery selection information identifying a destination for the event selected by a user of the recipient computing device. Subsequently, the computing platform may generate one or more event orchestration commands directing an external event processor to execute one or more actions associated with the event, and may send the one or more event orchestration commands to the external event processor via an external event processing interface.