From december 1999 to september 2005
Oracle DBA for Oracle 7- and 8i databases.
Full stack Business Objects engineer.
From May 2006 to April 2008
Oracle DBA and PL/SQL developer on platforms ranging from Oracle 8i up to 10g on Unix, Linux and Windows.
From May 2008 to May 2017
As a freelancer I provided SysOps services for Linux and Unix systems as well as Oracle DBA consultancy for a number of large companies and municipalities in the Netherlands.
From May 2017 to Februari 2018
I was asked to build an Oracle 11g RAC cluster on an HPE blade chassis for a large telco in the Netherlands. This project was succesfully completed.
From March 2018 to December 2022
I was hired as a senior Linux engineer tasked with system- and network administration of an on-prem infrastructure running Debian Linux machines virtualized on KVM hypervisors.
In 2019 the company built a new warehouse without a facility to host the infrastructure on-prem, which meant the entire infrastructure had to be migrated to the cloud.
Google Cloud was chosen as the cloud provider to host the infrastructure. Due to time pressure, a lift-and-shift methodology was chosen. After succesfully migrating the infrastructure to the cloud, the focus shifted to documentation and standardisation as well as converting legacy applications to cloud native where possible.
From January 2023 to current day
Freelance Linux SysOps and architecture, with an emphasis on Google Cloud.
Due to my broad skillset, I am currently exploring the field of penetration testing and Red Teaming. I have not yet decided on a specialization in this field.