| Morgan, Adam Nolan | Classification, follow-up, and analysis of Gamma-ray bursts and their early-time near-infrared/optical afterglows | 2014 | University of California, Berkeley | GMOS-N/GMOS-S/NIRI | USA |
| Morley, Caroline V. | Clouds and hazes in exoplanets and brown dwarfs | 2016 | University of California Santa Cruz | NIRI | USA |
| Hamer, Stephen | Cold gas in galaxy cluster cores | 2012 | Durham University | GMOS-N/GMOS-S | UK |
| Hsieh, Henry H. | Comets amongst the asteroids: icy bodies in the inner solar system | 2007 | University of Hawaii | GMOS-N | USA |
| Bolton, Adam S. | Constraints on early-type galaxy structure from sepctroscopically selected gravitaitonal lenses | 2005 | Massachusetts Institute of Technology | GMOS-N | USA |
| Figueredo, Elysandra | Conteúdo Estelar de Regiões HII Gigantes da Galáxia | 2005 | University of Sao Paulo | NIRI | Brazil |
| Sanders, Nathan Edward | Core-collapse Supernova Progenitors in the Era of Untargeted Transient Searches | 2014 | Harvard University | GMOS-N | USA |
| Thanjavur, Karunananth | Cosmic applications of Gravitational Lens Assisted Spectroscopy (GLAS) | 2009 | University of Victoria | GMOS-N/GMOS-S | Canada |
| Cao, Yi | Cosmic explosions: observations of infant hydrogen-free supernovae towards an understanding of their parent systems | 2016 | California Institute of Technology | GMOS-N | USA |
| Lamareille, Fabrice | Cosmological evolution of the physical properties of galaxies | 2006 | Laboratoire d'Astrophysique de l'Obbservatoire Midi-Pyrenees (France) | GMOS-N | Other |
| Lorenzo-Oliveira, Diego | Cronometros Estelares: Calibrando a Atividade Cromosferica em Estrelas de Baixa Massa | 2016 | Federal University of Rio de Janeiro | GMOS-N | Brazil |
| Nilo-Castellon, Jose Luis | C´umulos de galaxias de baja luminosidad en rayos-X | 2013 | Universidad Nacional de Cordoba | GMOS-N/GMOS-S/NIRI | Argentina |
| Salinas, Ricardo | Dark matter in central and isolated galaxies | 2011 | Universidad de Concepcion | GMOS-S | Chile |
| Ren, Bin | Detection and Characterization of Circumstellar Disks in Scattered Light | 2019 | The Johns Hopkins University | GPI | USA |
| Naud, Marie-Eve | Detection and characterization of distant giant exoplanets around low-mass young stars using direct imaging | 2016 | Universite de Montreal | GNIRS/GMOS-S/NICI/PHOENIX | Canada |
| Vilardell, Francesc | Determination of the distance to the Andromeda Galaxy using variable stars | 2009 | Universitat de Barcelona | GMOS-N | Other |
| Bonanos, Alceste Zoe | Determining accurate distances to nearby galaxies | 2005 | Harvard University | GMOS-N | USA |
| Bernard, Anais | Development of new data reduction and analysis tools for Wide-Field Adaptive Optics | 2017 | Laboratoire d'Astrophysique de Marseille | GSAOI+GeMS | Other |
| Lawton, Brandon | Diffuse interstellar bands in damped Lyman-alpha and starburst galaxies | 2008 | New Mexico State University | GMOS-S | USA |
| Debes, John H., IV | Digging for substellar objects in the stellar graveyard | 2005 | The Pennsylvania State University | NIRI+ALTAIR | USA |
