Raynard serves as Head of School at Phillips Academy in Andover, Massachusetts, a role he has held since July 2020. Prior to his work at Andover, he served for 10 years as president of Grinnell College, where he now serves as president emeritus. 

Much of Raynard’s research has focused on the social determinants of health as well as diversity in the scientific workforce. Raynard has been board certified in internal medicine, public health and preventative medicine, and geriatric medicine. He has served in a variety of leadership roles for the National Institutes of Health as well as the Centers for Disease Control and Prevention, among other organizations.

In recent years, Raynard has joined the boards of the RAND Corporation, The Pew Charitable Trusts, and Beth Israel Lahey Health.