A system and method for synchronizing profile data based on one or more changes in affinity to knowledge data in a system. The profile data may include at least an affinity of a person to knowledge data. In some embodiments, metadata information associated with stored content belonging to one or more topical categories of knowledge data may be provided. The metadata information may represent a history of the person's activities with the stored content. The affinity of the person to the one or more topical categories of knowledge data may be determined based at least in part on the metadata information. One or more changes in the affinity of the person to the one or more topical categories of knowledge data may be determined. The profile data may be synchronized to indicate the determined one or more changes.