CA Callahan has worked in the IT field for 20 years, 15 of those as a Microsoft Certified Trainer.As the founder and primary technologist of CallahanTech, Callahan has been a consultant, speaker, trainer, and technical writer since the 1990s. She has had the opportunity to present at numerous events including TechEd and Windows Connections. She has authored or coauthored a number of books about Windows Server, Windows Client, and Microsoft SharePoint, including Microsoft SharePoint 2013 Administration Inside Out. She has specialized in Network Access Quarantine Control, integration, Windows deployment, and SharePoint, with a focus on Windows Presentation Foundation. Callahan has also been the recipient of the SharePoint MVP award several years in a row, and often gives back to the community by speaking at user groups and SharePoint Saturdays around the US.