Auditor Timothy M. O'Brien, CPA, was elected as Denver's 24th Auditor to serve as a check and balance on Denver’s “strong mayor” form of municipal government.
Denver, CO
Joined October 2016
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Accountability that lasts. Where Denver lives.
Denver’s 2027 Audit Plan focuses on city services that affect residents’ everyday lives.
Explore the full 2027 Audit Plan: denvergov.org/Government/Age…
This concludes the Artificial Intelligence Governance discussion.
Read the full report: denvergov.org/Government/Age…
Auditors made 23 recommendations to strengthen AI oversight, risk management, monitoring, and data protection.
✅Technology Services and the airport agreed to all 23.
#AIGovernanceAudit
Denver International Airport has no formal AI governance framework.
Auditors found:
⚠️ AI risks are not formally assessed.
⚠️ Vendor oversight lacks AI-specific controls.
⚠️ AI-use monitoring and data-loss prevention need improvement.
#AIGovernanceAudit
Auditors found weaknesses in the city’s AI governance:
⚠️ Risk-management processes lack formal documentation.
⚠️ AI inventories are incomplete or inaccurate.
⚠️ Data-loss prevention controls were not applied to all city computers.
#AIGovernanceAudit
Now on Denver’s independent Audit Committee agenda: Artificial Intelligence Governance.
Auditors examined how the city and Denver International Airport oversee AI use, manage risks, and protect data.
#AIGovernanceAudit
This concludes the @DenverMuseumNS Follow-Up discussion.
Read the full report: denvergov.org/Government/Age…
City and board oversight have improved, but accountability gaps remain.
⚠️ City-museum agreements are not finalized.
⚠️ The process for determining annual city funding remains undocumented.
⚠️ Some board governance policies remain incomplete.
#DenverMuseumNSFollowup
✅ The museum fully implemented all 8 emergency preparedness recommendations.
The @DenverMuseumNS strengthened its emergency plans, evacuation procedures, staff training, and drills to better protect visitors, employees, and its collections.
#DenverMuseumNSFollowup
The museum has improved collections management and physical key controls.
However, gaps remain in inventory training, data monitoring, and access reviews.
⚠️ These weaknesses could affect record accuracy and the security of collections.
#DenverMuseumNSFollowup
The October 2026 independent Audit Committee meeting is underway
Now on Denver’s independent Audit Committee agenda: the @DenverMuseumNS Follow-Up.
Auditors reviewed 35 recommendations from our 2024 audit
✅ 20 fully implemented
🟡 10 partially implemented
❌ 5 not implemented
Accountability That Lasts.
The 2027 Audit Plan reflects a standard for independent oversight: professional, independent, objective, and connected to the community.
The people in office may change. The standard for accountability should not.
Watch the video
The Denver Auditor’s Office released its 2027 Audit Plan today, featuring audits of homeless services, Denver International Airport, and tax increases.
The final annual plan from independent elected Auditor Timothy M. O’Brien, CPA, reflects the high standard of his tenure.
Every audit we choose connects to the people, services, and systems that keep Denver running.
Next week, we’ll release our 2027 Audit Plan and show where independent oversight will focus next, from issues residents experience every day to risks happening behind the scenes.
ALT A hand holding a mangifier glass that is part of the cover of the 2027 aduti plan
16th Street, one of the city’s most iconic and historic roads, underwent a long renovation before reopening in October 2025. In this episode of Ask the Auditor, learn how this underground discovery added millions to the project and why concerns remain.
youtu.be/nR52qsaYCt4
Some risks you see. Others you don’t. We audit both.
From public services and major projects to technology, spending, and internal systems, independent oversight looks at what residents see and what they don’t.
That’s how we determine what belongs in an audit plan.
How do we choose what to audit? Every year, we carefully inspect where independent oversight can make the greatest difference.
We consider risk, data, emerging issues, professional judgment, and input from the people of Denver.
Our latest follow-up revisits the National Western Livestock Center Design audit.
The report looks at what changed and what concerns remain around governance, oversight, documentation, and invoice processing.
Read the follow-up report denvergov.org/Government/Age…
ALT Auditor OBrien medium shot
The Mayor’s Office of the National Western Center made little progress addressing risks involving the National Western Center, according to a new follow-up report from Denver Auditor Timothy M. O’Brien, CPA.
Read more: denvergov.org/Government/Age…
ALT press release: Mayor’s Office of the National Wester Center improvements are bare minimum