Co-founder of Elephant Scale - a Big Data training and consulting company.
Co-author of an open source book "Hadoop Illuminated", http://hadoopilluminated.com/, and of "HBase Design Patterns" book.
Author of FreeEed, an open source platform for eDiscovery based on Apache Hadoop.
Mark knows about 10 languages, is a Mensa member, and writes "Talmud Illuminated" blog http://mkerzner.blogspot.com