Dr. Mark Z. Johnson

Contact Info

22755 North Douglas
Orlando, Oklahoma 73073
405 880 1902


Mark Johnson is an Associate Professor of Animal Science at Oklahoma State University where he held the Totusek Endowed Chair of Animal Science from 2009 to 2014. He has served as the Supervisor of the OSU Purebred Beef Cattle Center since 1992. During his time as supervisor, the OSU purebred herd has bred and shown many champions, highlighted by exhibiting the Champion “Pen of Three” Angus bulls at the National Western in Denver in 1994, 1997 and 2006, and the Reserve Champion Pen in 2009 and 2011. Mark also coached the OSU Livestock Judging Team from 1992 to 2013. The OSU team was highly successful during his tenure as coach, finishing as either Champion or Reserve Champion team in 70% of their contests over 21 years. He earned the “National Coach of the Year” award seven times, coached six teams that won the American Royal and four National Champion teams. The 2007 OSU team holds the all-time record for high team score at the American Royal. The 2005 OSU team set the record for the all-time high score in the National Championship contest. The 2012 OSU team holds the all-time record for high team score in the Carload contest at the National Western. The 2001, 2010 and 2012 OSU National Champion teams are three of the only 12 teams in history to win the American Royal and Louisville contests back to back. Mark has considerable experience in judging cattle shows including a multitude of national events, jackpots and state fairs. Mark, his wife Brenda and two daughters Sydney and Charley, live on a ranch near Orlando, Oklahoma where they operate J&J Cattle Company.


Ph.D. Animal Breeding and Genetics, Kansas State University, 1992

M.S. Ruminant Nutrition, Oklahoma State University, 1988

B.S. Animal Science, Oklahoma State University, 1986

A.S. Agriculture, Northeastern Oklahoma A&M, 1984

Judging Experience

Judging References



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