Dr. Mann has traveled extensively in Europe and Asia, and since the early 1970s has had an abiding interest in eastern philosophies and meditation. After pursuing a doctorate in Buddhist studies and meditation at the California Institute of Asian Studies in San Francisco, he became interested in the healing powers of nature, and in 1978 helped found the Pacific College of Naturopathic Medicine. He moved to Seattle to continue his studies at Bastyr University, where he graduated with a degree in naturopathic medicine.
He has been teaching at Bastyr University since 1997 and was Dept. Chair from 2000-2012. He has participated in homeopathic seminars both in the United States and Europe since 1992, and he continues to be part of a homeopathic seminar that meets twice a year in Leuven, Belgium, with Henny Heudens-Mast. He has a diplomat in homeopathy by the Homeopathic Academy of Naturopathic Physicians.
Dr. Mann has been a practicing naturopathic physician at the same location in the Capitol Hill neighborhood in Seattle, since 1987.