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 |
|---|---|
| Efraim Petel | Alerting Solutions, Inc. |
| Aviv Siegel | AtHoc, Inc.* |
| Doug Allport | Canadian Association for Public Alerting and Notification (CAPAN) |
| Thomas Fahy | CellCast Technologies |
| Bryan Kaplan | Collaborative Fusion, Inc. |
| Buddy Ackerman | Desktop Alert Inc. |
| Howard Ryan | Desktop Alert Inc. |
| Scott Johnson | ESI Acquisition, Inc.* |
| Werner Joerg | IEM |
| Frank Bell | Individual |
| Asuman Dogac | Individual |
| Thomas Ferrentino | Individual |
| Peter O'Dell | Individual |
| Robert Torchon | Individual |
| Gavin Treadgold | Individual |
| Matt Walton | Individual |
| Alison Keefe | Lockheed Martin* |
| David Miller | Lockheed Martin* |
| Donald McGarry | Mitre Corporation* |
| Peter Alterman | National Institutes of Health |
| Rex Brooks | Network Centric Operations Industry Consortium |
| Paul Mangione | Network Centric Operations Industry Consortium |
| Carl Reed | Open Geospatial Consortium, Inc. (OGC)* |
| Himadri Banerjee | Previstar Inc. |
| David Lamensdorf | Safe Environment Engineering |
| Wernher Behrendt | Salzburg Research Forschungsgesellschaft |
| David Ellis | Sandia National Laboratories |
| Laura Slater | Solace Systems |
| Sukumar Dwarkanath | SRA International, Inc. |
| Gary Timm | SRA International, Inc. |
| Stephen Tonkin | Telecommunication Systems, Inc. |
| Jeff Waters | US Department of Defense (DoD)* |
| Chad Foster | US Department of Homeland Security* |
| Timothy Gilmore | US Department of Homeland Security* |
| Martena Gooch | US Department of Homeland Security* |
| Tahir Latif | US Department of Homeland Security* |
| Camille Osterloh | US Department of Homeland Security* |
| Jacqueline Postell | US Department of Homeland Security* |
| Ronn Bailey | Vanguard Integrity Professionals |
| Sean Crane | viaRadio Corporation |
| Patrick Gannon | Warning Systems, Inc.* |
| Elysa Jones | Warning Systems, Inc.* |
| Bill Tabor | WidePoint Corporation |
| Anthony Rutkowski | Yaana Technologies, LLC |