Southey's formal training includes two years at the Brighton College of Art in Sussex, England; a year in Durban, South Africa; and two degrees obtained from Brigham Young University (1967 and 1969). He taught at the University through 1977 and has since pursued his career independently, although he remains deeply interested in art education giving occasional workshops particularly in drawing.
Many major commissions in various parts of the country and Britain in painting and sculpture have dominated his production in the last few years, demonstrating the rapid growth of interest by an ever widening group of collectors. Southey's work is included in numerous private collections in the United States and throughout the world, ranging from that of actress Brook Shields to Senator and Mrs.Orrin Hatch. His work is also included in a wide variety of institutional and corporate collections. His media include drawing, printmaking, painting, stained glass, and sculpture. He has been increasingly interested in writing and has collaborated with K. Mitchell Snow of Washington D.C. in the production of a major, lavishly illustrated volume about his work entitled Trevor Southey: Reconciliation.