| John Mather (SWG chair) | NASA Goddard Space Flight Center | Senior Project Scientist |
| Mark Clampin | NASA GSFC | Observatory Project Scientist |
| Rene Doyon | University of Montreal | CSA Project Scientist (starting summer 2012) |
| Pierre Ferruit | ESTEC | ESA Project Scientist (acting) |
| Kathy Flanagan | Space Telescope Science Institute | S&OC Head |
| Marija Franx | Leiden University | NIRSpec Science Representative |
| Jonathan Gardner | NASA Goddard Space Flight Center | Deputy Senior Project Scientist |
| Matt Greenhouse | NASA Goddard Space Flight Center | ISIM Project Scientist |
| Heidi Hammel | AURA | Interdisciplinary Scientist |
| John Hutchings | Herzberg Institute of Astrophysics | CSA Project Scientist (until summer 2012) |
| Simon Lilly | Swiss Federal Institute of Technology | Interdisciplinary Scientist |
| Jonathan Lunine | Cornell University | Interdisciplinary Scientist |
| Mark McCaughrean | ESA | Interdisciplinary Scientist |
| Matt Mountain | Space Telescope Science Institute | Telescope Scientist |
| Malcolm Niedner | NASA/GSFC | Deputy Senior Project Scientist/Technical |
| George Rieke | University of Arizona | MIRI Science Lead |
| Marcia Rieke | University of Arizona | NIRCam Principal Investigator |
| George Sonneborn | NASA GSFC | Operations Project Scientist |
| Massimo Stiavelli | Space Telescope Science Institute | Interdisciplinary Scientist, S&OC Project Scientist |
| Chris Willot | Herzberg Institute of Astrophysics | NIRISS Science Lead |
| Roger Windhorst | Arizona State University | Interdisciplinary Scientist |
| Gillian Wright | U.K. Astronomy Technology Centre | MIRI European Science Lead |