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John P Jeffries has worked in many countries around the world, consulting on the Oracle technology. He is interested in different cultures and enjoys teaching others. At present, John lives and works in Singapore and is employed as a subject matter expert at a global bank, delivering enterprise-wide infrastructure design solutions, particularly in the database private cloud and data replication space. Since he wrote his first book, Oracle GoldenGate 11g Implementer's Guide, he has been heavily focused on leveraging Oracle's Fusion Middleware products (including GoldenGate) to address performance, data migration, and data delivery issues. With over 15 years of experience in Oracle, John has worked for a number of global organizations, such as BT, Siebel Systems, Dell, Thomson Reuters, and Oracle Corporation, to name a few. At Oracle, he worked in advanced customer services on key accounts as a senior principal consultant and became the UK data replication expert, often publishing articles on his own website (http://oracle11ggotchas.com/). John is an Oracle Certified Professional and a GoldenGate specialist. He gives presentations at ODTUG conferences and continues to share his real-life hands-on experience through his work. Known for his ability to provide robust, effective solutions and workarounds, John delivers his knowledge, tips, and tricks in his new book, Oracle GoldenGate 12c Implementer's Guide.