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Jason T. Shilson

Jason T. Shilson


“I put myself in our clients’ shoes to help ensure their business goals are adequately met.”

Jason T. Shilson

Jason T. Shilson has more than 22 years of experience with O’Keefe, Lyons & Hynes LLC and specializes in state and local tax litigation matters and the firm’s administrative appeals practice. Together with Mark Davis, Jason oversees hundreds of annual property tax appeals before the Illinois courts and the Illinois Property Tax Appeal Board. He has prosecuted tax appeals across the country, including cases in California, Florida, Iowa, Maine, North Carolina and Wisconsin.

A seasoned litigator, he has represented nearly every type of property owner (from Fortune 50 corporate, commercial and industrial companies to residential) in real property tax appeals and related tax matters. Mr. Shilson has worked at the O’Keefe firm for the significant majority of his career, having clerked for the firm while attending law school. He then joined the firm as an associate in 1994, after a year of practice with a national commercial litigation firm. He became a member/partner in 2002.


Jason focuses his practice on:

  • Fortune 50 companies
  • National and regional developers, and owners of industrial, retail, office and multi-family properties
  • Institutional investors
  • Corporate campuses
  • Small to mid-sized businesses

Practice areas:

  • State and local property tax litigation matters
  • Administrative appeals before IL courts and IL Property Tax Appeal Board
  • Prosecution of tax appeals across multiple jurisdictions
  • General corporate tax matters

“The firm has a very high client retention rate because, among other things, our clients trust us.”

Member of:

Chicago Bar Association

Institute for Professionals in Taxation

bar admissions

Illinois Supreme Court, 1993

U.S. Court of Appeals for the Seventh Circuit, 1994

U.S. District Court for the Northern District of Illinois, 1993


DePaul University College of Law (Chicago), J.D., 1993

University of Michigan (Ann Arbor), B.A., 1990