Dr. Muhammad Ajmal Khan earned his PhD in Animal Nutrition from Faisalabad University of Agriculture, Pakistan. His graduate work was focused on enhancing the nutritional worth of low-quality fibrous feed for ruminants. Dr Khan has spent the last 15 years in Animal Science research, teaching and extension at the Seoul National University, National Institute of Animal Science, South Korea, the University of British Columbia, Canada and at AgResearch, New Zealand where he has advanced his career from a post-doctoral fellow to a Senior Scientist. The primary research interest of Dr. Khan is physiology and nutrition of ruminants. Dr. Khan is interested in using early-life interventions to influence the development and functions of the gastrointestinal tract, mammary gland, and immune system in young animals to improve lifetime health and performance of dairy and dairy-beef cattle. In his career, he has conducted many metabolic, nutrition and production studies where he has used state of the art methods to study physiology and performance traits of ruminants. Dr. Khan developed a step-down weaning system for calves, evaluated the effects of starch sources, forages and feed additives on gastrointestinal tract development and investigated the effects of a variety of liquid feeds on the health performance of young animals. Dr Khan is currently leading calf and dairy cattle nutrition research at AgResearch, New Zealand. Dr Khan has co-authored 87 manuscripts, 47 conference abstracts and presentations, 25 project reports and 1 book chapter. Dr. Khan research output has received> 3300 citations (Google Scholar) and 28 h-index. He has also published 14 outreach articles and serving as a reviewer on 10 leading journals in animal and dairy science (Publons).