Ulli has been an active contributor in the Jenkins project since 2007. Currently, he is the maintainer of several Jenkins plugins, mostly in the area of build result visualization using modern JS based user interfaces. Plugins that Ulli maintains include the Warnings Next Generation, Coverage, and Git Forensics plugins as well as several UI related JS wrapper plugins like Bootstrap, Prism, and ECharts. He is a member of the Jenkins UX SIG and the Jenkins Governance Board.

By day, he is a professor of Software Engineering at the University of Applied Sciences Munich, where he also tries to win new Jenkins contributors by letting students develop new features in their student projects and theses. He also helps new contributors (and students) in our Jenkins forums or by giving some talks in our Jenkins Meetups.