Gresh received a Bachelor of Science degree from Chimie ParisTech in 1974. Eight years later he was given a Doctor of Philosophy degree from the University of Pierre-et-Marie-Curie.
Gresh began his career as a researcher at National Center for Science Research in Paris in 1977. Since 2000 he has been a director research in Laboratory of Pharmacological and Toxicological Chemistry and Biochemistry at Paris Descartes University.
Nohad is a contributor of over 120 articles to professional journals.
Gresh is a member of American Chemical Society.