He previously was leader of the equine teaching and research program and horse judging team coach at Kansas State University. Before joining the faculty at Texas A&M, Dr. Sigler was involved in the livestock feed industry as a nutritionist and sales director.

Dr. Sigler conducts research and trains graduate students in the area of exercise science. Specifically, he is interested in conditioning and management of the juvenile and mature athletic horse to maximize performance and enhance structural integrity. Other areas of interest include nutritional strategies to enhance performance and reduce musculo-skeletal injuries. Dr. Sigler has served as President of the Equine Science Society, has published numerous scientific and popular press articles and has served as an invited speaker at many national and state-wide meetings. He is a member of the American Society of Animal Science, American Registry of Professional Animal Scientists and the Equine Science Society.

Dr. Sigler has a lifetime of practical horse experience. He is an AQHA-approved judge and has judged horse shows in nearly every state and in 5 foreign countries. He is also an accomplished horseman, having shown and trained horses for a variety of performance events. He was a founding member and Past-President of the Stock Horse of Texas Association and serves on the Board of Directors. Dr. Sigler has been actively involved in youth activities, serving on the State Horse Advisory Committee and serving for several years as a County 4-H Club manager, adult leader, and judging team coach. He has also conducted numerous horse clinics and workshops for youth across the state of Texas.