Perforce is a version control and source code management system that has been in use since 1995. It is used by many large companies like Google, Oracle, and SAP to manage source code repositories. This case study describes how Engineering Software Lab, an Israeli company, uses Perforce to manage a large codebase with over 8,000 users. It outlines their Perforce installation and configuration, how they integrate it with development tools and IDEs, and best practices they have developed for managing such a large codebase with Perforce.