After leaving Tufts in 1995, Loew became the dean of the Cornell University School of Veterinary Medicine, his alma mater.
Loew served as a consultant to many universities, foundations, government agencies and companies, including Columbia and Ohio State Universities, the Howard Hughes Medical Institute, the Pew Charitable Trusts, the U.S. Food and Drug Administration, the National Institutes of Health, NASA, the Smithsonian Institution and the U.S. Department of Agriculture.