He spends his time with a variety of clients, large and small, mentoring and helping them use Hadoop to solve their problems. Previously Casey was an architect and software engineer at Explorys, a start-up spun out of the Cleveland Clinic, focusing on data mining and medical informatics using Hadoop and HBase. Prior to that, he worked on a number of ventures across several industries, including scientific programming in the oil industry, writing scalable server infrastructure for VoIP, and working on metadata repositories at Oracle. All of these things have something in common: they deal with large amounts of data. In a galaxy far, far away and a long time ago, he was a graduate student at Texas A&M in the Department of Mathematics.