- Delafield Professor and Chairman of the Department of Pathology and Cell Biology, Columbia University.
- Director of the Pathology Service at the New York Presbyterian Hospital.
- Co-Director of the Taub Institute for Research on Alzheimer’s Disease and the Aging Brain.
- Director of the Medical Scientist Training Program at Columbia.
Alzheimer’s Disease and neurodegenerationMechanisms of cell injury and death in the neurological diseases.