Taxonomies are a key feature of Drupal architecture, but traditional web design teams do not always have the background for design and governance needed to support them. A taxonomist can bring best practices and a wealth of experience to this often overlooked area. This talk explains what skills and deliverables a taxonomist can provide, when to incorporate them into a project, and how to work with them (both in house resources and external consultants). In addition, we'll look at the roles and responsibilities associated with taxonomy governance to ensure a consistant, credible, and useful taxonomy.