Professor Grossman and his team, study linguistic and cognitive measures annually in a longitudinal cohort along with multimodal imaging, blood, and cerebrospinal fluid biomarkers of disease, using digitized pathology at autopsy as a gold standard. He served as the founding Chair of the Medical and Scientific Advisory Board for the Association for Frontotemporal Degenerations and the Chair of the Board of Governors of the Academy of Aphasia. He helped found the Society for the Neurobiology of Language and the International Society for Frontotemporal Degenerations.