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Director's Office > Committees

External Committees

NRAO/GBO Users Committee

The Users Committee (UC) is made up of users and potential users of NRAO and GBO facilities from throughout the scientific community. It advises the NRAO and GBO Directors and the Observatory staff on all aspects of Observatory activities that affect the users of the telescopes. This committee, which is appointed by the NRAO and GBO Directors, meets annually.

The membership of the NRAO/GBO Users Committee for 2024 is listed below. In 2014, NRAO integrated the ALMA North American Science Advisory Committee (ANASAC) as a standing subcommittee of the Users Committee. Users Committee members who also serve on the ANASAC are indicated, as are the ANASAC representatives to the international ALMA Science Advisory Committee (ASAC).

  • Sean Andrews, Harvard-Smithsonian Center for Astrophysics (2026) ANASAC
  • Alessandra Corsi, Texas Tech University (2024)
  • Jane Huang, Columbia University (2028)
  • Melodie Kao, University of California, Santa Cruz (2025)
  • Adam Leroy, Ohio State University (2028)
  • Duncan Lorimer, West Virginia University (2025)
  • Karen Masters, Haverford College (2025)
  • Brett McGuire (Chair), Massachusetts Institute of Technology (2025) ANASAC
  • Stefanie Milam, NASA/GSFC (2024) ANASAC/ASAC
  • Elisabeth (Betsy) A.C. MillsUniversity of Kansas (2027)
  • Cherry Ng, University of Toronto (2026)
  • Jennie Paine, University of Colorado Boulder (2026)
  • Daniel Perley, Liverpool John Moores University (2026)
  • Kazushi SakamotoAcademia Sinica Institute of Astronomy & Astrophysics (2024) ANASAC
  • Melissa Soriano, NASA Jet Propulsion Laboratory (2025)
  • Tony WongUniversity of Illinois Urbana-Champaign (2027)

The Users Committee Charge (pdf).

The NRAO/GBO Users Committee has created a web form to receive comments and suggestions from the astronomical community regarding any aspect of the Observatory’s scientific operations.


ALMA North American Science Advisory Committee

The ANASAC provides scientific advice to the NRAO director on the science operation of ALMA and the North American ALMA Science Center, as representatives of the wider North American astronomical community.

  • Sean AndrewsHarvard-Smithsonian Center for Astrophysics (2026)
  • Sara Ellison, University of Victoria (2026)
  • Leslie Looney, University of Illinois Urbana-Champaign (2027)
  • Meredith MacGregor, Johns Hopkins University (2027)
  • Brett McGuireMassachusetts Institute of Technology (2025)
  • Stefanie Milam (Chair)NASA/GSFC (2024)
  • Kazushi SakamotoAcademia Sinica Institute of Astronomy & Astrophysics (2024)
  • Karin Sandstrom, University of California, San Diego (2027)

Bold = Member of ALMA Science Advisory Committee (ASAC)


The NRAO Visiting Committee

The NRAO Visiting Committee is appointed by the AUI Board of Trustees to review the management and research programs of the Observatory. The Visiting Committee meetings are held at alternating NRAO sites. The current membership of the Committee is:

  • Lewis Ball, SKAO (2025)
  • Jeremy Darling, University of Colorado at Boulder (2025)
  • Lynn MatthewsHaystack Observatory (2025)
  • Beth WillmanCEO LSSTC (2025)