Engineer for Cumberland Mountain Coal & Timber Company, Dunlap, Tennessee, 1905, railroad location, Springdale Association, Louisville, Kentucky, 1905-1906. Assistant engineer, New York Central Railroad Company, 1906-1907. Assistant in сivil engineering, Columbia University, 1907-1910.
Instructor railway civil engineering, University of Illinois, 1910-1912. Associate professor railroad engring, 1912-1917, professor since 1917, director Surveying Camp, 1912-1941, University of California.