Rosenbaum is the founding Director of the MGH Center for the Neuroscience of Psychedelics, and Chief Emeritus of the MGH Psychiatry department. He is an international authority on mood and anxiety disorders. He specializes in pharmacotherapy of these conditions and in treatment-resistant disorders, especially ongoing longitudinal studies of particular therapies. This portrait was painted with this room, the Hackett room, in the background, featuring depictions of two other former Chiefs of Psychiatry.