80% of the knowledge in organizations is undocumented, and can only be found in the heads of the employees. If you want to solve a problem, you must often contact a colleague rather than reading a document. This implies that effective people findability can be more important than a document search, especially in large organizations where you don’t necessarily know what person has the skills you need. The presentation shows how a global telecom company has used Topic Maps as a strategic tool to improve people findability and knowledge sharing.