About the Authors

Martin Alfke is the co-founder and CEO of example42 GmbH. He has been a Puppet and automation enthusiast since 2007 and has delivered official Puppet training in Germany since 2011. In the past, he would have said that he is a system administrator. Nowadays, he prefers the term infrastructure engineer. The big difference is that system administrators ssh into systems, whereas infrastructure engineers fix their automation. With example42 GmbH, Martin supports Puppet Inc as a Puppet service delivery partner. He likes giving talks and workshops at conferences around the globe.

Felix Frank has used and programmed computers for most of his life. During and after working on his computer science diploma, he gained experience on the job as a systems administrator, server operator, and open source software developer. He spent six years of his eleven year career as a Puppet power user. In parallel, he spent about two years intensifying his studies through ongoing source code contributions and active participation in several conferences.