A UX practitioner demonstrates 8 core competencies. By assessing each team member's 'signature' in these eight areas, managers can build a fully rounded user experience team. This approach also helps identify the roles for which each team member is most suited alongside areas for individual development.
Craft, Leadership
The 8 competencies of user experience: a tool for assessing and developing UX Practitioners
Knowledge
How to Improve Your Design Team’s Productivity — The Startup
Information Architects are the Architects of Understanding. They “help users to understand where they are, what they’ve found, what to expect, and what’s around.”
Information Architecture
Information Architecture (4 Parts) — UX Knowledge Base Sketches
The power titles used to come with are slowly fading away in the modern business world. There is also a trend right now where companies and individuals create their own titles to hype their brands in marketing channels.