Rahul Malewar has been working with various data warehousing tools for the past 8 years, mainly with Informatica PowerCenter. He has worked on various versions of Informatica PowerCenter, starting from Version 8.1 to the latest 9.x. He has worked for various MNCs in India, such as UST Global, Cognizant Technology Solutions, and Principal Financial Group in Pune. He has worked on the implementation of a data warehouse involving Informatica for Fortune 500 MNCs, such as Wellpoint and Principal. He has experience of working on multiple real-time projects in a couple of MNCs and utilized these skills to write this book. He has been running his own training center named Learnwell Technocraft (www.dw-learnwell.com) since 2010, where they provide training on more than 25 data warehousing technologies over classroom, corporate, and online sessions. He has also written a blog on data warehousing concepts. At the time of writing, he has provided training to more than 1,200 candidates, ranging from freshers to professionals with 20 years of experience. He is also the director of a software firm named Gut Lernen Technocraft Pvt. Ltd.; the company works on data warehousing and mobile-related projects. He provides free assistance on Informatica installation-related issues and other technical issues for which he can be contacted at firstname.lastname@example.org.