Arek Dreyer has been an Apple Certified Trainer since 2002. President of Dreyer Network Consultants Inc. in Chicago, Arek delivers courses and provides training around the world. Arek provides consulting, troubleshooting, and integration services for customers who use iOS devices and Mac computers in complicated environments and is the coauthor of Apple Pro Training Series: OS X Server 5.0 Essentials.

Adam Karneboge has been an Apple Certified Trainer since 2003. CTO of HC S Technology Group, Adam instructs technical training courses and delivers consulting, troubleshooting, deployment, and integration services to business, enterprise, and education clients. Adam has been the technical editor for the majority of the OS X Support and OS X Server Essentials books published by Peachpit since OS X v10.7.