He has been involved with the Lucene / Solr projects for some time and was recently made a committer for his contributions and involvement. He is largely responsible for Lucene 4's new spatial module. His most visible role in the community is as the principal author of "Apache Solr 3 Enterprise Search Server" published by PACKT in 2011, an update to the first edition published in 2009. He’s has presented at the first Lucene Revolution in 2010 and at Basis's Search conference in 2011 & 2012. Within MITRE, he occasionally develops and teaches short training classes on Solr.