On Drupal.org for 19 years 7 months

Drupal events: 
OSCON 2005 or the off-site Drupal conference at OSCON 2005 (Portland, Oregon)
Drupal conference colocated with the Open Source CMS and Blogging Tools Summit (Vancouver, Canada)
OSCMS 2007, Sunnyvale

Credits on security advisories

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Credits on issues

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I contributed Drupal modules
I contributed Drupal themes
I contributed Drupal documentation
I help in the Drupal support forums
I provide Drupal-related services
I contributed Drupal translations