Born in Denver, Colorado, Symes received a Bachelor of Philosophy degree from Yale University in 1900 and a Bachelor of Laws from Columbia Law School in 1903. He was in private practice in New York City, New York from 1902 to 1906, and in Denver from 1906 to 1921. His practice being interrupted by service in the United States Army during World War I from 1917 to 1919, where he achieved the rank of Major. He was the United States Attorney for the District of Colorado from 1921 to 1922.
