Ross L. Leffler was born August 7, 1886 in Butte, Montana. He attended University of Michigan School of Engineering. In 1910 began work in the Carnegie Steel Corporation, in Duquesne, Pennsylvania; on his retirement in 1957 he was assistant to the executive vice president for operations of the United States Steel Corporation. In 1957, he was appointed first assistant secretary of the Department of the Interior for fish and wildlife; was instrumental in establishment of the Arctic Wildlife Range in northeastern Alaska and the Key Largo Coral Reef Preserve off the coast of Florida. From 1927 to 1957, he was a member of the Pennsylvania Game Commission and was its president from 1928 to 1944. He was one of the founders of the Pennsylvania Federation of Sportsmen's Clubs in 1932 and served as its first secretary. In 1961 he was elected to the board of directors of the National Wildlife Federation, and was elected it's president in 1963 and served one year before ill health necessitated retirement. A member of numerous other conservation organizations, he was a former president of the International Association of Game, Fish and Conservation Commissioners; vice president of the Boone and Crockett Club; director of World Wildlife Fund; and honorary director of the International Wild Waterfowl Association. He died December 14, 1964 in Pennsylvania.
From the description of Leffler, Ross L. (Ross Lillie), 1886-1964 (U.S. National Archives and Records Administration). naId: 10616054