Jennifer Gregg is a professor at San Jose State University and a licensed psychologist in California, USA with a specialization in psycho-oncology and end-of-life care. She has been researching, teaching, and training professionals in Acceptance and Commitment Therapy (ACT) since 1995 and is a peer-reviewed ACT trainer. Clinically she has helped thousands of patients, caregivers, and family members live with vitality through illness, death, loss, and grief.