In recent years, climate service has emerged as a new field to better connect climate data providers and users of climate change–related information. The aim is to transform climate-related information into customized, user-centered products. This transformation of data is increasingly sought after by decision-makers due to public and regulatory pressure. As one of the first institutions to provide climate services, the Climate Service Center Germany (GERICS) has collected a wide range of different experiences in the field of climate services. Based on this know-how, GERICS has identified three distinct roles—we call them hats—that the institute commonly assumes as a climate service provider: the facilitator, the developer, and the trendsetter. The definition and tasks related to each of these distinct hats is presented alongside examples. The key ingredient for the success of a service product heavily depends on successful user engagement. While wearing any of the three hats and depending on a project’s context as well as the project stage, GERICS makes use of several methods to codevelop services with users. Based on past experiences, four different styles of user engagement, distinguished by the degree of intensity of participation, were established: information, consultation, dialog, and partnership. The connection of the three hats and the four styles of user engagement creates a structure in which climate service providers operate. It may help other climate service providers to reflect upon the general outline of their services and enhance the effectiveness of their engagement with users in transdisciplinary research settings.