George LeRoy Hahn, PhD, PE

George LeRoy Hahn, PhD, PE

Title: Agricultural Engineer, Biometeorologist
Company: Agricultural Research Service, United States Department of Agriculture
Location: Tonganoxie, Kansas, United States

George LeRoy Hahn, PhD, PE, Agricultural Engineer and Biometeorologist with the Agricultural Research Service and the U.S. Department of Agriculture, has been recognized by Marquis Who’s Who Top Scientists for dedication, achievements, and leadership in agricultural engineering.

Retiring after more than 55 years of professional experience, Dr. Hahn has found success as an agricultural engineer and biometeorologist, serving as a project leader and a technical advisor for the Agricultural Research Service with the United States Department of Agriculture between 1957 and 2012. During this time, he was additionally active as a contributing author for myriad articles and book chapters regarding environmental and climate matters affecting livestock production, efficiency and well-being. A 60-year member and fellow of the American Society of Agricultural and Biological Engineers, he’s also a member of the American Society of Animal Science, the American Meteorological Society and the International Society of Biometeorology, for which he served as treasurer. Raised on a farm, Dr. Hahn was drawn to his field as a result of his background in agriculture, as well as his desire to contribute to society.

Dr. Hahn initially obtained a Bachelor of Science in agricultural engineering from the University of Missouri in 1957. He went on to earn a Master of Science in agricultural engineering from the University of California, Davis in 1961 and a Doctor of Philosophy in atmospheric science from the University of Missouri in 1971. He was further certified as a professional engineer in the state of Missouri. As a testament to his exceptional professional efforts, he was presented with an award from the American Society of Agricultural Engineers and the Metal Buildings Manufacturers Association in 1976. Likewise, he took home an Award for Outstanding Achievement in Bioclimatology from the American Meteorological Society in 1976, a Lifetime Achievement Award from the International Society of Biometeorology in 2008 and the Albert Nelson Marquis Lifetime Achievement Award. Likewise, Dr. Hahn was selected for inclusion in multiple editions of Who’s Who in America, Who’s Who in Science and Engineering, Who’s Who in the Midwest and Who’s Who in the World. In addition to professional accomplishments in engineering and biometeorology, Dr. Hahn used his training, knowledge, and abilities during more than 20 years of serving as primary caregiver for his wife, and continues to serve as a resource for others through organizing and participation in caregiving support groups.

For more information, please visit:

Lifetime Achievement

Contact Dr. Hahn:

Leave a Reply