Otto Frederick Hunziker (25 December 1873 – 16 November 1959) was a pioneer in the American and international dairy industry, as both an educator and a technical innovator.

After leaving Purdue University, Hunziker managed research and operations at a large, national condensary, continued to drive ADSA's standardization and publishing efforts, represented the U.S. at international dairy congresses, and facilitated dairy industry improvements across the globe.

Hunziker spent many early years in Goldbach, Switzerland, where his father was a pastor, professor, and member of the canton parliament.

[5] During this time period, significant new development in dairy processing technology was occurring on both sides of the Atlantic Ocean.

In the United States, Hunziker worked for two years as a laborer on a dairy farm near Attleboro, Massachusetts.

[3] Otto Frederick married Florence Belle Burne on 10 April 1905 in Portville, Cattaraugus County, New York.

[17]) From 1910 to 1926, Hunziker chaired ADSA's Committee on Official Methods of Testing Milk and Cream for Butterfat.

[19] Apart from application of improved pedagogy and scientific methodology, Hunziker oversaw planning and construction of Smith Hall, the building which thereafter housed Purdue's dairy manufacturing group, extension service, and creamery.

While at Purdue, he published over 50 bulletins, leaflets, and scientific treatises addressing dairy farm and plant problems.

[3] In 1917, Hunziker left Purdue to manage manufacturing and research at the Blue Valley Creamery Company in Chicago, Illinois.

[5][19][26][27][28] When the World's Dairy Congress was held in the U.S. in 1923, the U.S. Department of Agriculture selected Hunziker to head the industry and economics program.

[29] He later represented the United States at World Dairy Congresses in London, 1928; Copenhagen, 1931; Berlin, 1937; Stockholm, 1949; and The Hague, 1953.