My list of affiliations includes publishers, editor networks, and professional networks. Among my affiliations are:
The Author's Guild supports working writers, advocating for the rights of writers by supporting free speech, fair contracts, and copyright. Members must be professional writers.
Association of Ghostwriters
Professional trade Association of Ghostwriters.
EFA (Editor Freelance Association)
The EFA is a group of professional freelance writers, editors, and illustrators. See my profile here.
The American Copy Editors Society works toward the advancement of copy editors.
American Society for Indexing
The American Society for Indexing advocates, educates, and provides the central resource for indexing professionals.