The following people participate in Open CSA as representatives of Supporting Entities. (OASIS members who choose to participate as Open CSA Observers are not named here.)
| Person | Organization |
|---|---|
| Christopher Keller | Active Endpoints, Inc. |
| Michael Rowley | Active Endpoints, Inc. |
| Gianfranco Tabasso | AITI-Associazione Italiana Tesorieri de Impresa |
| Vito Vavalli | AITI-Associazione Italiana Tesorieri de Impresa |
| Ezer Farhi | ARX |
| Dan Romascanu | Avaya, Inc. |
| Owen Williams | Avaya, Inc. |
| William Barnhill | Booz Allen Hamilton |
| Steve Jones | Capgemini |
| Vinkesh Mehta | Deloitte Consulting LLP |
| Chanda Sathe | Deloitte Consulting LLP |
| Richard Spears | Deloitte Consulting LLP |
| Christoph Meinel | Hasso Plattner Institute |
| Robert Freund | Hitachi, Ltd. |
| Matsuki Yoshino | Hitachi, Ltd. |
| Bryan Aupperle | IBM |
| Nagaraj Chinni | IBM |
| Mike Edwards | IBM |
| Thomas Foster | IBM |
| Simon Holdsworth | IBM |
| Diane Jordan | IBM |
| Mike Kaiser | IBM |
| Doug Tidwell | IBM |
| Mirza Begg | Individual |
| Anil Gurnani | Individual |
| Gershon Janssen | Individual |
| Paul Knight | Individual |
| Mariano Cilia | Intel Corporation |
| M Davis | Intel Corporation |
| Christoper Bonatti | International Electronic Communication Analysts, Inc. (IECA, Inc.) |
| Sami Vaskuu | Newelo Oy |
| Martin Chapman | Oracle |
| Anish Karmarkar | Oracle |
| Jeff Mischkinsky | Oracle |
| Gilbert Pilz | Oracle |
| Jaime Meritt | Progress Software |
| Mark Little | Red Hat |
| Ron Barack | SAP AG |
| Sanjay Patil | SAP AG |
| Ivana Trickovic | SAP AG |
| Nicole Wengatz | Siemens AG |
| Carlo Milono | TIBCO Software Inc. |