Abstract: Systems and techniques for determining an expertise of an employee in an enterprise are described. A crawler may examine one or more external data sources that are external to an enterprise network associated with the enterprise to identify one or more documents associated with the employee. The external data sources may include patent databases, technical paper databases, and the like. A classifier may be used to determine keywords in the one or more documents. For each of the keywords, a term frequency-inverse document frequency (TF-IDF) value may be determined. The keywords may be ranked based at least in part on the TF-IDF value associated with each keyword to create ranked keywords. The ranked keywords may be displayed. A font characteristic used to display a particular keyword of the ranked keywords may be determined based at least partly on the TF-IDF value associated with the particular keyword.