The Speakers

As always, the Tour speakers will be members of the Oracle ACE program at the highest level, carrying the coveted title of Oracle ACE Director. This title is granted by Oracle to a very select group of people known for both technical expertise and great communication skills, and there are only about a hundred world-wide. Some countries supplement these international luminaries with other presenters.

The speakers this year will be:

Ludovico Caldara

ludovicoLudovico is a database specialist with more than 16 years of experience on the full Oracle stack (Clusterware, DataGuard, RAC, ASM, EM) but he also has deep knowledge of MySQL and other DBMS engines. He has administered literally thousands of databases in big datacenters so he has developed a natural leaning to automatization, monitoring and high availability. He is certified on Oracle (OCP 12c, OCE) and MySQL (OCP). He is a blogger and a confirmed community contributor, with the “RAC Attack 12c” project and his RACSIG, ITOUG and SOUG board membership. Ludovico is currently working as a senior consultant at Trivadis in Lausanne, Switzerland, where he can cultivate his passion for technology, bike, snowboard and family.

Roel Hartman

roelRoel started a long time ago using Oracle RDBMS 5, Oracle Forms 2.3, RPT/RPF and Oracle*Case 4.5. Since a few years he focuses mainly on Oracle Application Express.

Roel has been a speaker on UKOUG, OOW, Collaborate, ODTUG’s KSCOPE and a number of local Oracle User Groups. Within ODTUG he acted as the APEX Content Lead for the Kscope14 and KScope15 conferences and joined the Board of Directors in March 2016. 

He keeps an (APEX-related) blog on In June 2009 Roel received an Oracle ACE award and in August 2010 he’s appointed as Oracle ACE Director. Roel is a co-writer of the “Expert Oracle Application Express” and “Oracle Application Express for Mobile Web Applications” books.

Roel is Director at APEX Consulting in The Netherlands.

John King

johnkingJohn King is a Partner in King Training Resources, a US-based firm providing instructor-led training since 1988 for application and database developers. John has worked with Oracle products and the Database since version 4. John develops and presents customized courses in a variety of topics, including Oracle, MAF, ADF, Web Services, SOA, SQL, PL/SQL, Java, XML, .NET, user experience, and several other topics. John presents frequently at industry conferences, including UKOUG, ODTUG, IOUG, Oracle OpenWorld, AUSOUG, and RMOUG Training Days. John currently serves on the AZORA Board of Directors.

Martin Widlake

mdw_headshot3Martin has been working with Oracle databases and PL/SQL since 1992, mostly as a development DBA, performance specialist and PL/SQL programmer. He is passionate about getting the best out of the tech, sharing that knowledge and supporting user groups. As well as presenting at many conferences and smaller meetings, Martin maintains a blog, writes articles for magazines, helps organise the UKOUG Tech conferences and recently contributed to his first book, “Real world SQL and PL/SQL”. Outside of I.T. his interests are science and, especially, genetics.