A discussion on the intricacies of enterprise search; contrasting web search, the systems distributed nature, various applications, and evaluation measures. Following this, a shift in focus to expertise search and the development of the Terrorist Expertise Locator (TEL), built using the latest open source enterprise search technology. Implementation follows an enterprise search methodology centered on tuning relevancy for the applicable dataset, in this case the Global Terrorism Database (GTD). Data analysis drives the application of information retrieval and information extraction techniques; stemming, query expansion, query operators, and document quality weighting. Evaluation of the enterprise search engine, in various configurations, provide insight into best practices used to improve relevancy. Three expertise calculation methods are compared; count-based, relevancy weighted, and expertise weighted. Validation of results are established by cross-referencing un-indexed popular media and government sources, including CBC news reports and FBI declassified files.