Mark is a committer on Apache Bigtop and a committer and PMC member on Apache Sentry (incubating). He’s a software engineer at Cloudera working on Spark and has contributed to Apache Hadoop, Apache Hive, Apache Sqoop, and Apache Flume projects. Mark is a co-author of O’Reilly’s “Hadoop Application Architectures” title. He has also written a section in O’Reilly’s “Programming Hive” title. Mark has presented at numerous conferences and meetups, and is a guest blogger on a various data related blogs.