Drupal.org (the project, the website and the community) is run primarily by volunteers.
It's built with Drupal 6 and has many customizations in code. There are many Drupal.org-specific projects that are used to organize improvements and code.
Who are the maintainers?
Drupal.org infrastructure team leaders (org chart)
List of Drupal.org site maintainers
List of Documentation maintainers
How can I contribute?
Everyone can (and should) contribute to maintaining drupal.org. If you are interested in contributing to Drupal.org, some background information:
- Contribute to documentation
- Drupal.org site maintainer's guide
- Make Drupal.org awesome (primarily how to work on Drupal.org's code)
- Drupal.org improvements (community initiatives)