Jon Loeliger is a freelance software engineer who contributes to Open Source projects such as Linux, U-Boot, and Git. He has given tutorial presentations on Git at many conferences including Linux World, and has written several papers on Git for Linux Magazine. In prior lives, Jon has spent a number of years developing highly optimizing compilers, router protocols, Linux porting, and the occasional game. Jon holds degrees in Computer Science from Purdue University. In his spare time, he is a home winemaker.
Matthew McCullough is an energetic 15-year veteran of enterprise software development, world-traveling open source educator, and co-founder of Ambient Ideas, LLC, a US consultancy. Matthew currently is a trainer for Gradleware, educator for GitHub.com, author of the Git Master Class series for O'Reilly, speaker on the No Fluff Just Stuff tour, author of three of the top 10 DZone RefCards, including the Git RefCard, and President of the Denver Open Source Users Group. His current topics of research center around project automation, including: build tools (Gradle, Leiningen, Maven, Ant), distributed version control (Git, Mercurial), testing frameworks (Geb, Spock, JUnit, TestNG, Mockito),… continuous integration (Jenkins, Hudson, Bamboo) and code quality metrics (Sonar, CodeNarc, PMD).