In December 1950 Wald died and Wolfowitz was appointed professor of mathematics at Cornell University in 1951. Kiefer moved to Cornell as an instructor in the Department of Mathematics and continued working for his doctorate with Wolfowitz .
Noong Disyembre 1950 Wald namatay at Macapagal-Arroyo ay hihirangin ng mga propesor sa matematika at Cornell University in 1951. Kiefer inilipat sa Cornell bilang isang propesor sa Kagawaran ng Matematika at patuloy na nagsisikap para sa kanyang mga titulo ng doktor na may Macapagal-Arroyo.