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

Sponsor-level members

• AtHoc
• US Department of Defense (DoD)

Contributor-level members

• Canadian Association for Public Alerting and Notification (CAPAN)
• Emergency Information Infrastructure Project (EIIP)
• Google Inc.
• IEM
• Lockheed Martin
• Mitre Corporation
• Network Centric Operations Industry Consortium
• Open Geospatial Consortium, Inc. (OGC)
• Previstar Inc.
• Salzburg Research Forschungsgesellschaft
• Solace Systems
• Telecommunication Systems Inc.
• TSSG
• US Department of Homeland Security
• Yaana Technologies, LLC