Since 2011 Erich Gamma is a Distinguished Engineer at Microsoft in Zurich and he works with his team on Visual Studio Code (https://code.visualstudio.com/). Before joining Microsoft he worked at IBM Rational Software's Zurich lab and was the technical lead of Rational Team Concert. Erich was one of the leaders of the Eclipse project and the original lead of the Eclipse Java development environment. He is also a member of the Gang of Four, which is known for its classical book, Design Patterns - Elements of Reusable Object-Oriented Software. Erich has collaborated with Kent Beck on developing JUnit, the de facto standard testing tool for Java software.