Porter Jarvis joined the Provision Department of
Swift & Co. in 1926, as a trainee in its pork department in
St. Joseph, Missouri, later rising to be assistant to the vice president, John Holmes, in charge of the pork division, 1933 to 1938. From 1933 to 1938, he was assistant to Holmes, when Holmes became president of the company. Jarvis was vice president of Swift and Company from 1941 to 1950, and serving as a director from 1949 to 1967. In 1950, he became the first person to serve as executive vice president from 1950 to 1955, then rising to become chief executive of the company as president, from 1955 to 1964, and then chairman from 1964 until his retirement in 1967. He was a director of the
American Meat Institute, the
Iowa State University Foundation, the
Illinois Central Railroad,
International Harvester Company, and the
Continental Illinois National Bank & Trust. Additional, he served as a trustee of the
University of Chicago and the
Museum of Science and Industry. He was a member of the Economic, Commercial, Chicago, and Union League clubs in Chicago. Retiring from Swift in accordance with its age-65 retirement policy, Jarvis had overseen sweeping changes in the meat packing industry and within Swift & Company. Under his leadership, the company diversified into such fields as nitrogen products and potash; investment in the company's insurance complex as well as increasing Swift's adhesive plants to twenty-five located in the United States, Canada, and England. In addition, Swift substantially developed specialized services for hotels, restaurants, and other institutions. Overseas, Swift went into a variety of ventures on a joint basis with local partners in other countries. Jarvis was a strong advocate for the company's research and development department. At the time of his retirement on 1 December 1967, the company was in the process of moving 300 scientists into a new multi-million dollar research center located at
Oak Brook, Illinois. Jarvis was succeeded as chief executive of the company by Robert W. Reneker. ==Honors==