Robert Reys has been at Mizzou for more than half of a century. He also spent a year at the National Science Foundation as a program officer, a year at the University Tuskuba (Japan) and was a Fulbright Research Lecturer at the University of Guanajuato (Mexico) and the University of Gothenborg (Sweden). He has authored or co-authored more than 250 articles in professional journals and co-authored or edited more than 30 books.
During the last 20 years he has been engaged in research related doctoral programs in mathematics education and was co-founder of the STaR program for early career mathematics educators. He received the Lifetime Achievement Award from the National Council of Teachers of Mathematics in 2008. He continues to play competitive tennis in USTA events and officiates intercollegiate tennis matches in the SEC, Big 10 and Big 12 Conferences.