Long is Professor of Religion and Asian Studies at Elizabethtown College, in Pennsylvania, USA.
He is associated with the Vedanta Society, DANAM (the Dharma Academy of North America) and the Hindu American Foundation.
A major theme of Long's work is religious pluralism, a topic he approaches from a perspective informed by the process philosophy of Alfred North Whitehead and which he refers to as a "Hindu process theology."He has written books on Jainism and Hinduism.