The following people participate in Emergency MS as representatives of Supporting Entities. (OASIS members who choose to participate as Emergency MS Observers are not named here.)
| Person | Organization | Role |
|---|---|---|
| Simon Berman | AtHoc, Inc.* | Member |
| Aviv Siegel | AtHoc, Inc.* | Voting Member |
| Judith Woodhall | ComCare* | Member |
| Art Botterell | Contra Costa County Community Warning System | Voting Member |
| Tracy Ryan | Emergency Interoperability Consortium | Voting Member |
| Scott Johnson | ESI Acquisition, Inc.* | Voting Member |
| Werner Joerg | IEM | Voting Member |
| Rex Brooks* | Individual | Member |
| David Coursey | Individual | Member |
| Randall Shane | Knowledgeable & Innovative Technical Solutions, Inc. (KITS, Inc.) | Voting Member |
| Alison Keefe | Lockheed Martin* | Voting Member |
| Barbara Reagor | Monmouth University | Voting Member |
| Claudia Bitner | MyStateUSA | Voting Member |
| Dee Schur | OASIS * | Voting Member |
| Paul Thorpe | OSS Nokalva* | Voting Member |
| Alessandro Triglia | OSS Nokalva* | Member |
| Himadri Banerjee | Previstar Inc. | Voting Member |
| Paula Moss | Raytheon | Member |
| David Ellis | Sandia National Laboratories | Voting Member |
| Sukumar Dwarkanath | SRA International | Member |
| Chad Foster | US Department of Homeland Security* | Member |
| Timothy Gilmore | US Department of Homeland Security* | Member |
| James Goodson | US Department of Homeland Security* | Member |
| Haeyoung Kim | US Department of Homeland Security* | Member |
| Tahir Latif | US Department of Homeland Security* | Voting Member |
| Camille Osterloh | US Department of Homeland Security* | Member |
| Jacqueline Postell | US Department of Homeland Security* | Member |
| Elysa Jones | Warning Systems, Inc.* | Voting Member |