Ogden College, graduated 1888. University of Virginia, graduated 1891.
In 1886, aged sixteen, he became stenographer for the Circuit Court of Warren County. In 1890 he became secretary to the assistant chief attorney of the Louisville and Nashville Railroad at Louisville, Kentucky. He was appointed assistant attorney after graduating law school, assistant chief attorney in 1897.
He married Alice Clymer Macfarlane in 1900, they had one child.
He was promoted to vice-president of the Louisville and Nashville Railroad in 1901. Hines spent nearly ten years fighting railroad regulation in state and federal courts.
In 1906 he joined Cravath, Henderson and de Gersdoff in New York City, becoming a partner in 1907. He was with the firm for seven more years.
Hines joined the Atchison, Topeka and Santa Fe Railway as general counsel, was made chair of the executive committee in 1908 and chairman of the board in 1916.
In December, 1917, President Woodrow Wilson nationalized most U.S. railroads under the United States Railroad Administration. William G. McAdoo was made director general, Hines agreed to become assistant director general. McAdoo resigned in January, 1919, and Hines stepped in as director general for the remainder of nationalization under the Railroad Administration, which ended on March 1, 1920. Following the end of World War I, Hines worked and traveled extensively in Europe.
In the latter half of the 1920s, Hines was a director of the Chicago, Burlington and Quincy Railroad, a director of its subsidiary, the Colorado and Southern Railway, general counsel of one of its parent companies, the Great Northern Railway, and a partner in Hines, Rearick, Dorr, Travis and Marshall, which specialized in railroad law.