Erik M. Gregory, PhD Return to Directory Name: Erik M. Gregory, PhD Endorsement Type: Celebrant Offers services in: Texas City: Cambridge State: Massachusetts Website: http://www.erikgregory.com Email Address: egregory@post.harvard.edu Phone Number: (617) 645-7871 Positive Psychology practitioner, resident therapist of the Harvard Humanist Chaplaincy Hub, and Celebrant for individuals and couples from all backgrounds, spiritual affiliations, and sexual orientations.