All organizations are welcome to become EI Member Section Supporting Entities. To join EI, contact member-services@oasis-open.org.

Sponsor-level members

• AtHoc
• ESI Acquisition, Inc.
• KITS
• Sandia National Laboratories
• Warning Systems, Inc.

Contributor-level members

• Contra Costa County Community Warning System
• Emergency Interoperability Consortium
• IEM
• Lockheed Martin
• Monmouth University
• MyStateUSA
• OSS Nokalva
• Previstar Inc.
• US Department of Homeland Security