Mark is the president of Gardiner Angus Ranch, Inc., a family-owned, generational beef operation located in Ashland, Kan. Under Mark’s direction, the ranch has grown an embryo transfer (ET) and artificial insemination (AI) program that performs more than 3,500 transfers a year, making it one of the largest AI/ET beef operations in the world. Gardiner is a founding board member and stockholder of U.S. Premium Beef, former Board member of the American Angus Association, former chairman of the NCBA Seedstock Council and former president of the Kansas Angus Association. He is also active in the Beef Improvement Federation (BIF). Mark is continuing the Gardiner family legacy of community involvement, both at home and nationally. Under Mark’s guidance in 2012, the Henry C. Gardiner Scholarship and Lecture Series was created and endowed at Kansas State University. To date, 22 undergraduate students have received scholarships.

Mark and his wife, Eva, have three sons, Cole, Ransom and Quanah, who represent the fifth generation of the Gardiner family ranching in Clark County, Kansas.