Deiby Gómez:

Deiby Gómez is an Expert DBA, with experience in Oracle Exadata Database Machine and High Availability Solutions . He gives conferences frequently in different Oracle events in Guatemala, among them OTN LAD Tour, Java Day, First Symposium of Oracle and many Universities. Oracle ACE since 2013. Deiby is the first Guatemalan who published articles in Oracle LAD.


Yenugula Venkata Ravikumar

Yenugula Venkata RaviKumar is a DBA with over 15 years of experience specialized in high availability database environments (RAC, Data Guard, among others), tuning and performance, migrations, backup and recovery, Oracle Exadata x2/x3/x4, expert in operating systems such as AIX, HP-UX y Linux . He has participated as speaker in several Oracle events in India where he currently resides. He obtained an Oracle Certified Master (OCM) from Oracle Corporation in 2009 and he was oracle employee for several years.



NassyamBasha is a Database Administrator. He is a post graduate who holds a master’s degree in Computer Applications from the University of Madras. He started practicing with dBase and FoxPro, and has participated in several projects with FoxPro and Oracle database knowledge 8i/9i/10g/11g/12c. He is an Oracle 11g Certified Professional having good knowledge in Oracle technologies such as Data Guard, RMAN, RAC, OEM, Grid control 11.1/12.1, Exadata and performance tuning, Also Co-authored book on Oracle 11gR2 Data Guard administrator’s Guide for PACKT publications.


Alex Zaballa:

Alex is currently working as a Senior DBA in Luanda and provides DBA services for the Ministry of Finance of Angola. He has over 14 years of experience with Oracle technologies. He began his career as an Oracle developer, participating in the development of an ERP software from definition to deployment. In 2007 he moved to Angola where he had the opportunity to work as a Senior Oracle DBA providing services for Jupiter. Alex is a member of the select group of highly qualified professionals worldwide who have the credential OCM - Oracle Certified Master and, among others, his specialties include design and implementation of high scalability, high availability and performance tuning. Alex is also an Oracle ACE member.


David Siqueira:

David Siqueira : DBA since 2001, operating in the Sao Paulo Brazil market, worked at major consulting firms always aim to improve knowledge and add value to environments where now, is 10 and OCP 11g, SQL Expert OCE, OCE RAC 10g, OCE was named Exadata and Oracle Essentials ACE in December 2011. Acts with High Availability environments Oracel 11g RAC, Exadata X2-2 and Database Administration in General. It also has expertise in operating systems Oracle VM Server and Oracle Businnes Intelligence.


Mohamed Houri

After an engineer diploma in Fluid Mechanics at the University of Algiers (Algeria) followed by a PhD. In Fluid Mechanics (scientific computing) at the University of Marseille (France) and a Post-Doctoral fellow at the Naval Architect Society of Japan, I started working as an Oracle Consultant in France.

Since then, I have now over 14 years of Oracle experiences of which the last 5 years have been spent in tuning complex applications via AWR/Statspack reports, 10046 Trace files, tuning complex and crucial queries using real time SQL monitoring, row source execution plan, 10053 CBO trace files, SQL Plan Management ensuring stable execution times, intelligent statistics gathering, building efficient data models, designing very precise indexes, designing suitable archiving and purging strategies, auditing vulnerable applications, solving lock and deadlocks issues, partitioning adequately, showing what feature suits what situation, developing powerful and re-usable PL/SQL code, implementing Naming and Best Practices Standards, Writing excellent technical and functional documents, translating business requirements into technical requirements, presenting via conferences, oracle concepts like cursors sharing, bind variables, adaptive cursor sharing, SQL plan Managment, Gathering Statistics, Diagnosing Stale Statistics, etc..

I have a deep knowledge of Oracle 8i, 9i, 10gR2, 11gR2 and the new release 12c. Have participated to several Oracle database upgrade from 8i to 10gR2 and from 10gR2 (UNIX) to 11gR2 (Linux)

I am an Oracle passionate. I love working with this database and this is why I am able to bring added value in any Oracle project.

I am tending during these recent months to transform my theoretical Exadata knowledge on a practical knowledge and to extend my tuning expertise to the Exadata machine.