In an event activity, cooperation from external parties, especially sponsors are needed. Therefore, as an organizer of an event, good handling and service to external parties must be maximized so that client satisfaction and sustainable cooperation are created. This study aims to find out the procedures and strategies used by the 2023 Indonesia International Motor Show sponsorship team in dealing with clients and making cooperation with these clients sustainable. This study uses descriptive qualitative research method with data collection by interview, observation, and literature study. The result was that the procedures carried out by the Indonesia International Motor Show 2023 sponsorship team could help the sponsor team achieve excellent service and the strategies that had been implemented to maintain sustainable cooperation were effective. In an event activity, cooperation from external parties, especially sponsors are needed. Therefore, as an organizer of an event, good handling and service to external parties must be maximized so that client satisfaction and sustainable cooperation are created. This study aims to find out the procedures and strategies used by the 2023 Indonesia International Motor Show sponsorship team in dealing with clients and making cooperation with these clients sustainable. This study uses descriptive qualitative research method with data collection by interview, observation, and literature study. The result was that the procedures carried out by the Indonesia International Motor Show 2023 sponsorship team could help the sponsor team achieve excellent service and the strategies that had been implemented to maintain sustainable cooperation were effective.