Born in Traverse City, Michigan, on December 13, 1944, to Philip Henry and Rhoda Winslow (Hathaway) Gregory, and married on July 15, 1995, to Deirdre Dianne Mason, Tom Gregory attended Blissfield (Michigan) Community High School, graduating as valedictorian in 1963. He obtained an A.B., summa cum laude with high honors in mathematics, from Oberlin College in 1967, where he was elected to Phi Beta Kappa in his junior year, and to Sigma Xi. He then attended Yale University, gained an M.A. in 1969, an M.Phil. in 1975, and finally his Ph.D. in 1977. He was a National Science Foundation Fellow, sang in the Yale Russian Chorus, and translated mathematics articles from Russian into English for the American Mathematical Society, of which he is a member. He spent three years as a Naval officer in Washington, D.C., on the staff of the first black admiral. An Engineering Duty Officer, he attained the rank of Commander in the U.S. Naval Reserve. He came to OSU Mansfield as a Lecturer in Mathematics and Computer Science in 1977. He is the author of articles in the Journal of Algebra and the Proceedings of the American Mathematical Society, and co-author of an article in Mathematische Annalen. He plays the piano, and has sung in choral groups of his church, school, and community. An Honorary Fellow of the University of Wisconsin-Madison in 1987-88 and 1992, he was awarded the Mansfield Campus Music Award in 1987 and a Mansfield Campus Service Award in 1991. By vote of the students of Mansfield Campus, he was awarded the Mansfield Campus Excellence in Teaching Award in 2009.