About the Auditor

Auditor O’Brien meets with the 9 Health Fair Audit and Finance Committee, on which he has served for seven years.

Denver’s Auditor, Timothy M. O’Brien, C.P.A., has more than 40 years of auditing and accounting experience.  
As the Colorado State Auditor, Tim O’Brien:

- Produced over 750 financial and performance audits
- Identified savings of over $200,000,000
- Managed budget increases to less than 1.5% per year
- Received the Legislative Program Evaluation Award from the National Conference of State Legislatures two times

As a Board member, an Audit Committee expert, and as an auditor, Tim O’Brien: 

  • Participated in over 300 audits
  • Facilitated the merger between two publicly held corporations
  • Advised public pension plans

Tim O’Brien has led both private and public organizations, and provided expert financial advice to those and others. 

His experience includes

  • Chairman of the Board, family of 29 mutual funds
  • President and CEO, American Humane Association
  • Chairman of the Board and Chair of the Audit Committee, Colorado Housing and Finance Authority (CHFA)
  • Board Member and Chairman of the Audit Committee, telecommunications company
  • Board of Trustees Member and Audit Committee Chairman, Public Employee Retirement Association of Colorado (PERA)
  • Board Member and Treasurer, Lions Club of Denver
  • President and Board Member, Colorado Society of CPAs of CPAs
  • Governing Council Member, American Institute of CPAs
  • Investment Advisory Council Member, Alaska State Pension Investment Board

Auditor O’Brien’s professional associations include

  • Colorado Society of CPAs (licensed since 1974)
  • American Institute of CPAs
  • Chartered Financial Analyst Institute
  • Colorado Society of Chartered Financial Analysts (licensed since 1999)
  • National Association of State Auditors (life member)


  • B.S.B.A. Accounting major, Loyola University- Chicago
  • M.B.A. University of Colorado

Personal life
Home in Southeast Denver, married to Mary Frances Kelley with three wonderful daughters