Just revising the thread that Kuala76 started.
Just need the org name, website and region/tracks they generally work and email contact (if wanted).
Just post up yours and I will add them to this list.
1. MARRC - www.marrc.org
- Summit Point, WV - CCS and WERA events
2. US Marshalls - www.usmarshalls.org
- Loudon (LRRS), Daytona, Moroso Motor Sports Park, Homestead, VIR, Road Atlanta and other southeast tracks.
3. Canadian Race Communications Association (CRCA) www.crca1.com