After graduation , Goldberg assumed a research fellow position at the French National Center for Scientific Research ( CNRS ) .
After graduation , Goldberg was subsequently appointed to a professorship at Paris University , where he would remain until 1998 .
After graduation , Goldberg assumed a research fellow position at the French National Center for Scientific Research ( CNRS ) , and was subsequently appointed to a professorship at Paris University , where he would remain until 1998 .