Private practice, Chicago, Illinois, 1859-1860
Gold miner, Colorado, 1860
Private practice, Denver, Colorado, 1861-1865, 1866
Member, Colorado Territorial Council, 1863-1866
Judge, U.S. District Court, District of Colorado Territory, 1866-1877; chief judge, 1866-1877
Professor of constitutional law and federal jurisprudence, University of Colorado, 1892-1913
Real estate speculator, Denver, Colorado, 1906-1913
Dean emeritus, University of Colorado School of Law, 1913