Besides his consultancy work, he conducts training classes, mainly in APEX, SQL and PL/SQL. Alex has been a speaker at numerous international conferences, such as ODTUG, Oracle Open World, UKOUG, IOUG, OUGF, BGOUG, OGH and OBUG. He was part of the Nordic ACE Directors Tour in 2012. He is also a frequent contributor at the Oracle Technology Network forum for SQL and PL/SQL. He wrote many articles in Oracle related magazines, and at regular intervals he writes about Oracle Application Express and Oracle database development on his blog “Notes on Oracle” (nuijten.blogspot.com). Alex is co-author of the book “Oracle APEX Best Practices” (published by Packt Publishers). In August 2010, Alex was awarded the Oracle ACE Director membership.