| Last Name | Name | Institution | Comm. | Roll | Since | Until |
|---|---|---|---|---|---|---|
| Beaudoin | Bruce | PASSCAL-NMT | DS | Observer | 2006 | Present |
| Mellors | Robert | University of California, San Diego | DS | Observer | 2021 | Present |
| Carter | Jerry | IRIS | DS | Director | 2019 | Present |
| Rodd | Rebecca | LLNL | DS | Observer | 2020 | Present |
| Ringler | Adam | USGS | DS | Observer | 2021 | Present |
