I would not be a part of any organization where an engineer decided if I was a designer or not. Since non designers could not be in the organization, it makes no sense that they would decide who could be.
I think you would have to be reviewed by “the founders” a select group within the select group. “the founders” would be the people that founded the organization at first, in time, others would be nominated to join… not unlike the moderator group here at core77. The core77 founders selected the initial group, eventually they made me admin, which meant I was able to knight future moderators, but we do it as a group with at least a minimal quorum.