Dr. Walsh is Bullard Professor of Neurology at Harvard Medical School, Chief of the Division of Genetics at Children's Hospital Boston, Investigator of the Howard Hughes Medical Institute at Children's Hospital Boston, and the former Director of the Harvard-MIT MD-PhD Program.

As Chief of the Genetics Division at Children's Hospital Boston, Dr. Walsh is working to leverage his lab's gene discovery efforts to harness new technology to improve genetic diagnosis in the clinical setting, as well as to collaborate with other members of the Division to develop improved treatments for children with neurological disorders.

Since establishing his lab in 1993, Dr. Walsh has been fortunate to receive a number of awards, including the Derek Denny-Brown Award (American Neurological Association), Dreiffus-Penry Epilepsy Award (American Academy of Neurology), Jacob Javits Distinguished Investigator Award (National Institute of Neurological Disorders and Stroke), Epilepsy Research Award (American Epilepsy Society), and Jacoby Research Award (American Neurological Association).  In 2010 he was elected a Fellow of the American Association for the Advancement of Science.