After attending Tufts University and serving as an officer in the U.S. Navy during the Korean War, Dr. Pecci earned a degree of Medical Doctor, with distinction, from Tufts University School of Medicine. He had his residency in Psychiatry at the Langley-Porter Neuropsychiatric Institute in San Francisco and a residency in Child Psychiatry at Mt. Zion Hospital in San Francisco. He has been a practicing psychiatrist for over 40 years. He was the founder and President of Rosebridge Graduate School of Integrative Psychology, a fellow in Community Psychiatry at the University of California School of Medicine and a lecturer at John F.

Kennedy University. As a popular speaker during the 70 s and 80 s at scientific and metaphysical conferences he made many acquaintances with prominent people in diverse fields of study such as Dr. William Tiller, then chairman of the Department of Material Sciences at Stanford University, holistic medical author, Dr. Norman Shealy, and Hugh Lynn Cayce, son of Edgar Cayce. During his professional career he served as medical director of the George Miller Jr. Centers for Multi-handicapped Children and Adults in Contra Costa County, California. He also served as chief psychiatrist at the California Youth Authority in northern California. He is the founder of the PSI (Psycho-Spiritual Integration) Process and the author of numerous books, including, Guidance from Within and Rise Above It.

Dr. Pecci s book, Chess: A Psychiatrist Matches Wits with Fritz with a foreword by Garry Kasparov, changed the strategy and tactics of chess in a previously unseen way, having a significant influence in the way chess computer programs are now written. He collaborated with Stanford professor Dr. William Tiller and wrote a foreword for his book, Science and Human Transformation, in which he describes how his interest in sacred geometry coincided with the idea of subliminal energies from other dimensionalities interwoven into the flowing patterns by which which all matter is created.".