Singer has had two Top 10 bestselling books in the Religion, Spirituality, and Faith category, The Untethered Soul (2007), at number 5, and The Surrender Experiment (2015), at number 7. His 2007 No. 1 bestseller The Untethered Soul, featured on Oprah in 2012, describes the lessons in inner peace he learned after his resignation from his software company, Medical Manager, which lost $190 million in defense costs after one of his executives got caught in a kickback scheme.
He founded The Temple of the Universe, which offers morning meditation sessions, topical talks twice a week, and well-attended Sunday services. The non-denominational spiritual organization invites people of all faiths to participate in activities that promote inner peace.
When he was a graduate student in economics at UF, then-president of Santa Fe College Alan Robertson asked him to tutor him and eventually insisted that Singer teach at SFC. Singer’s teaching style incorporated his life lessons, and his classes became so popular that Singer was able to grow a spiritual community at his property in Alachua, Fla., on which he built The Temple of the Universe in 1975. A visitor impressed with his work asked him to build an addition to their home, and after a round of positive word-of-mouth, Singer was able to launch his construction company, Built with Love.
In 1978, Singer fell in love with a TRS-80 Model 1 computer, one of the first PCs, and purchased it from a local RadioShack. He then taught himself programming, well enough to write an accounting system for his construction company. His connection with the RadioShack got him yet more customers, and his new enterprise became Personalized Programming. This company showed Singer the market need for a program that could handle billing of both medical patients and health insurance, which he provided through the ill-fated Medical Manager. Singer bounced back from the loss by exploring what it meant to accept all of life, good or bad, and turning his findings into a New York Times Best Seller.
Singer continues to support UF in several ways. He works closely with Professor of Astronomy Jian Ge to support the Dharma Planet Survey to find new worlds using UF’s new telescope, DEFT. An appreciator of art, Singer donated Monet’s Champ d’avoine, valued at $3.5 million, to UF's Harn Museum of Art.