About the Auditor

Denver has an independently elected auditor to serve as a check and balance on Denver’s “strong mayor” form of municipal government. Timothy M. O’Brien, C.P.A., was elected to a four-year term as Denver’s 24th Auditor in May, 2015.  Auditor O’Brien is licensed in Colorado as a Certified Public Accountant, has a MBA from the University of Colorado, and holds the designations of Chartered Financial Analyst and Chartered Global Management Accountant.   With 40 years of auditing and accounting experience, Auditor O’Brien has served on Denver’s Independent Audit Committee and on numerous private and public sector governing boards, including the Public Employees Retirement Association (PERA) of Colorado, the Colorado Housing and Finance Authority (CHFA), the American Humane Association, the Lions Club of Denver, and the Colorado Society of CPAs, where Auditor O’Brien served as president.  

During his 11-year tenure as the Colorado State Auditor, Auditor O’Brien produced more than 750 audit reports that identified savings of more than $200 million.  The bi-partisan National Conference of State Legislatures twice awarded Auditor O’Brien for his leadership in bringing accountability, transparency and fiscal prudence to Colorado state government.

Three Main Functions

  • Through the Audit Services Division the Auditor is responsible for conducting performance and financial audits of city agencies (including the Mayor and City Council) as well as companies and individuals doing business with the City.
  • The Auditor is responsible for enforcing the City’s prevailing and living wage laws through the Prevailing Wage Division.
  • The independent Audit Committee oversees the external audit of the City’s finances and receives audit reports from Audit Services.