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 |
| Yishai Brown | Amdocs Management Ltd. |
| Ezer Farhi | ARX |
| Wu Chou | Avaya, Inc. |
| Mark Combellack | Avaya, Inc. |
| Owen Williams | Avaya, Inc. |
| Kevin Wiseman | Avaya, Inc. |
| Hu Guangbin | Beijing CE Open Source Software Co., Ltd. |
| William Barnhill | Booz Allen Hamilton* |
| Steve Jones | Capgemini |
| Vinkesh Mehta | Deloitte Consulting LLP |
| Madhu Reddiboina | Deloitte Consulting LLP |
| Chanda Sathe | Deloitte Consulting LLP |
| Richard Spears | Deloitte Consulting LLP |
| Jean-Pierre Lorre | EBM WebSourcing |
| 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 |
| Anil Gurnani | Individual |
| Gershon Janssen | Individual |
| Paul Knight | Individual |
| Siva Krishnajee | Individual |
| Meeraj Kunnumpurath | Individual |
| Arvind Kumar | Infinitum Consulting Ltd. |
| Mario Antollini | Intel Corporation |
| Mariano Cilia | Intel Corporation |
| M Davis | Intel Corporation |
| Blake Dournaee | Intel Corporation |
| Martin Chapman | Oracle Corporation |
| Dave Chappell | Oracle Corporation |
| Uday Joshi | Oracle Corporation |
| Khanderao Kand | Oracle Corporation |
| Anish Karmarkar | Oracle Corporation |
| Jeff Mischkinsky | Oracle Corporation |
| Gilbert Pilz | Oracle Corporation |
| Chris Cheng | Primeton Technologies, Inc. |
| Jaime Meritt | Progress Software |
| Mark Little | Red Hat |
| Ron Barack | SAP AG* |
| Sanjay Patil | SAP AG* |
| Peter Peshev | SAP AG* |
| Martin Raepple | SAP AG* |
| Ivana Trickovic | SAP AG* |
| Nicole Wengatz | Siemens AG |
| Alistair Farquharson | SOA Software Inc. |
| Eduardo Gutentag | Sun Microsystems |
| David Burke | TIBCO Software Inc. |