Ravindra Bharathi has worked in the software industry for over a decade in various domains such as education, digital media marketing/advertising, enterprise search, and energy management systems. He has a keen interest in search-based applications that involve data visualization, mashups, and dashboards. He blogs at http://ravindrabharathi.blogspot.com.

Matthew Lee Hinman currently develops distributed archiving software for high availability and cloud-based systems written in both Clojure and Java. He enjoys contributing to open source software and spending time hiking outdoors.

Marcelo Ochoa works at the System Laboratory of Facultad de Ciencias Exactas of the Universidad Nacional del Centro de la Provincia de Buenos Aires, and is the CTO at Scotas.com, a company specialized in near real-time search solutions using Apache Solr and Oracle. He divides his time between University jobs and external projects related to Oracle and big data technologies. He has worked in several Oracle-related projects such as translation of Oracle manuals and multimedia CBTs. His background is in database, network, web, and Java technologies. In the XML world, he is known as the developer of the DB Generator for the Apache Cocoon project, the open source projects DBPrism and DBPrism CMS, the Lucene-Oracle integration using Oracle JVM Directory implementation, and in the Restlet.org project, the Oracle XDB Restlet Adapter (an alternative to writing native REST web services inside the database-resident JVM).

Since 2006, he has been part of the Oracle ACE program. Oracle ACEs are known for their strong credentials as Oracle community enthusiasts and advocates, with candidates nominated by ACEs in the Oracle Technology and Applications communities.

He is the author of Chapter 17 of the book Oracle Database Programming using Java and Web Services, Kuassi Mensah, Digital Press and Chapter 21 of the book Professional XML Databases, Kevin Williams, Wrox Press.