Karen Miller is principal investigator for the K12/Catalyst Medical Research Investigator Training program at Harvard Catalyst. She is chief of the neuroendocrine unit and director of the Neuroendocrine and Pituitary Tumor Clinical Center at Massachusetts General Hospital, as well as a professor of medicine at Harvard Medical School (HMS). Miller is a practicing endocrinologist and a continuously NIH-funded physician-scientist who conducts clinical, translational, and fundamental research to advance the care of patients with pituitary disorders. She studies the impact of hypothalamic and pituitary hormone dysregulation on body composition, bone, and the brain. Miller has authored more than 200 peer-reviewed publications. Awards in recognition of her work and mentorship include the Endocrine Society International Award for Excellence in Published Clinical Research in the Journal of Clinical Endocrinology and Metabolism and the HMS William Silen Lifetime Achievement in Mentoring Award.