Joining the D7Security group
We are looking for all kinds of people in different roles working with Drupal 7 projects. We need developers, communicators, project managers, designers, and marketers - there are a lot of tasks in an Open Source project like this.
Please reach out to Klausi via email (klaus.purer [at] protonamil.ch) with an introduction of yourself and how you would like to help.
Of course, it is fine to join discussions as a non-member as well!
Prerequisites for developers that are allowed to make security releases in this group:

Agreeing with the Values of the D7Security initiative.
Experienced in Drupal 7 module or theme development
Good understanding of Drupal 7 Writing secure code 
Understanding of the Drupal Security Team process and coordinated vulnerability disclosure.