She is the Head of the Retinoblastoma Program in the Hospital for Sick Children (Toronto) Department of Ophthalmology and Vision Sciences.
[1] Upon completing her fellowships, Gallie joined Sick Kids Hospital where she made numerous discoveries about the cancer retinoblastoma.
[4] In 1999, following the discovery of academic misconduct by Gideon Koren, Gallie moved her laboratory to Princess Margaret Hospital.
She was also named a Member of the Order of Ontario for being an expert in the treatment of retinoblastoma and contributing to the health care of Canadians.
[6] The following year, Gallie was named a Member of the Order of Canada for her "contributions to the prevention, diagnosis and treatment of retinoblastoma, a childhood eye cancer.