Denver Auditor

Timothy O'Brien, C.P.A.
Denver 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.

Latest News

Jul 22, 2015

Denver’s new City Auditor, Tim O’Brien, announced the hiring of former Denver Councilwoman City Kathleen MacKenzie as his Director of Communications and Community / Government Outreach.

Apr 23, 2015

There has been much confusion over the actual cost to build the new DIA Hotel and Transit Center. This White Paper, from Denver Auditor Dennis Gallagehr details the various costs and budget increases to make the numbers understandable.

Read the paper.

Apr 16, 2015

Denver's Road Home, the City's 10-year plan to end homelessness can't determine what if any impact it is having, despite having spent $63 million.

Read the Audit

Read the Press Release

Audit Services

Audit ServicesConducting independent financial, compliance, and performance audits of City agencies, programs, and contracts.

Audit Reports
Other Reports
Peer Review
Audit Follow-Up

Prevailing Wage

Prevailing WageEnforcing the City’s prevailing wage requirements to ensure that contractors and subcontractors working for the City pay their employees nothing less than the appropriate rate for the classification of worker.


Audit Committee

Audit CommitteeAssisting the Auditor in the Auditor’s oversight responsibilities of the integrity of the City’s finances and operations. Receives the results of the internal audits conducted by the Auditor.