Born and raised in Michigan, the son of two artists, Thaddeus Radell completed his B.F.A. at University of Detroit/Mercy before moving to New York City to study at Parsons School of Design with Paul Resika, Leland Bell and Jack Heliker. After receiving his M.F.A. in 1982, he spent the next several years painting and working as the studio assistant to Resika, Robert Deniro, Sr. and the sculptor, Sydney Simon. In 1984, Radell moved to France, where he taught at the Lacoste School of Arts, and was studio assistant to renowned Canadian painter, Joseph Plaskett. He spent these next fourteen years dividing his time between his studios in Provence and Paris. He returned to New York City in 2000 where he spent the next 20 years before moving to Catskill. NY, where he now lives and works, commuting into the city as Professor of Painting at the Borough of Manhattan Community College. He has been a member of the Bowery Gallery, NY, since 2014.