An expertise determination system and method may include detecting that a user is searching a topic, based on an activity of the user over a network, analyzing a shared content from social contacts of the user shared on one or more social media platforms to determine that a context of a content shared by at least one social contact of the user correlates to the topic searched by the user, determining that the at least one social contact of the social contacts of the user is a potential expert on the topic, based on a correlation metric between the context of the content and the topic, and alerting the user of an identity of the at least one social contact.