His current responsibilities include teaching one undergraduate course, entitled “Dairy-Poultry Science” and one graduate course, entitled “Ovarian Physiology,” and serving as faculty coordinator for the Dairy Teaching and Research Center (DTRC) and the Kansas Artificial Breeding Service Unit (KABSU). Research interests include synchronization of estrus and ovulation in dairy and beef cattle. Jeff has served on the editorial boards of the Journal of Dairy Science, Journal of Animal Science, Animal Reproductive Science, and served as senior section editor for the Physiology and Management Section of the Journal of Dairy Science.

Jeff received the 1990 American Dairy Science Association Agway Inc. Young Scientist Award, 1998 National Association of Animal Breeders Research Award, 2002 American Dairy Science Association Pharmacia Animal Health Physiology Award, 2002 Kansas State University Research and Extension Team Award, 2006 Kansas Dairy Leader, 2009 American Society of Animal Science Animal Management Award, 2012 American Society of Animal Science Physiology and Endocrinology Award, and named 2012 American Society of Animal Science Fellow. He is the author or coauthor of 187 peer-reviewed journal articles, 18 invited papers, 11 book chapters, 292 popular press articles, and 143 paper presentations at professional meetings.