Nelson Calero Pythian Services Inc.

Oracle ACE Director

Nelson is a Computer Engineer and seasoned presenter from the Oracle community, having been a presenter since 2008 at almost every major Oracle related conference in North America, Europe, and Latin America, including at Oracle OpenWorld. Nelson works with Oracle on a daily basis as a Principal Consultant for Pythian - the last technical team escalation point handling the Pythian client's most difficult and serious database technical problems. He is an Oracle ACE Director and Oracle Certified Professional, also certified with GCP and AWS. He is a member of the Board of the Latin American Oracle User Community (LAOUC), and a leader of the Uruguayan Oracle User Group (UYOUG).


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The conference is organized by the Croatian Association of Oracle users. More about the association can be found at

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