On Drupal.org for 19 years 5 months

Drupal Contributions: 

I help organizing the Dutch Drupal Training Days

Drupal events: 
DrupalCon Amsterdam 2014
DrupalCon Barcelona 2015

Credits on security advisories

View all security advisories

Credits on issues

View all issues

I contributed to Drupal issue queues
I contributed Drupal documentation
I help mentor new contributors