This document discusses building a Testing Center of Excellence (TCoE). It describes various TCoE models and their key activities and services including test process management, test tools/infrastructure management, non-functional testing/automation services, and a shared testing team. It outlines critical success factors and considerations for setting up a Testing Process CoE, Infrastructure/Tools CoE, and Non-Functional Testing/Automation CoE. The document concludes with a discussion of piloting a TCoE and realizing benefits from establishing a TCoE ecosystem.