| Name | Institution | Term |
|---|---|---|
| David Pooley | Trinity University | Dec 2021 – Dec 2024 |
| Kristin Madsen | UMBC / GSFC | Dec 2021 – Dec 2024 |
| Chien-Ting Chen | USRA / MSFC | Feb 2023 – Dec 2025 |
| Brian Grefenstette | Caltech | Jan 2024 – Dec 2026 |
Former chairs of the X-ray Science Interest Group (XR SIG) who served on the PhysPAG Executive Committee from 2012 through 2021.
| Name | Institution | SIG / SAG | Term |
|---|---|---|---|
| Grant Tremblay | Smithsonian Astrophysical Observatory | XR SIG | Dec 2019 – Dec 2023 |
| Jillian Bellovary | Queensborough Comm. Coll. | GW SIG / XR SIG | 2019 – 2022 |
| Ryan Hickox | Dartmouth College | XR SIG | 2018 – 2022 |
| John Tomsick | UC Berkeley | GR SIG / XR SIG | 2016 – 2019 |
| Mark Bautz | MIT | XR SIG | 2014 – March 2018 |
| Ralph Kraft | SAO | XR SIG | 2016 – 2018 |
| Jay Bookbinder | SAO | XR SIG | 2012 – 2016 |
| John Nousek | Penn State Univ. | XR SIG | 2013–2016 |