Over the past 15 years his experience includes due diligence, energy related contracts, as well as teaching landmen classes. Before joining Kiefaber & Oliva LLP, William represented individuals and businesses with tax issues against the IRS. As a trial attorney, William tried dozens of jury trials to verdict in state and federal courts in Oklahoma. William is licensed to practice law in the State of Oklahoma, as well as the Western, Eastern and Northern Federal Districts in Oklahoma. He is a graduate of the University of Oklahoma and enjoys supporting its sports teams.