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Person Photo

Colin J.A. Oldberg


555 17th Street, Suite 3200, Denver, CO 80202

Colin focuses his practice on state and local taxation, including tax compliance and tax litigation.

He advises clients on a variety of business tax decisions and represents them in litigation before state and local taxing authorities. Colin also has experience in federal tax matters, including federal income tax controversies, payroll taxes, and tax-exempt entities.

Before joining Holland & Hart, Colin worked as an Appellate Law Clerk for Judge Anthony J. Navarro, drafting criminal and civil judicial opinions. He also assisted with the supervision and management of judicial interns and chambers administration.


Bar Admissions

Professional and Civic Affiliations

  • Colorado Bar Association, Member
  • Northwestern University Club of Colorado, Vice President
  • Opera Colorado, Second Trumpet

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