Colorado attorney record
John Joseph O'Brien
John Joseph O'Brien is an attorney registered with the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) under bar number 59900. The current public license status is "ACTV – Active" as of 2026-06-14.
Active license with no disbarment or suspension of record.
The current license status of record is active, and no disbarment or suspension is reflected in the public record we hold.
A summary of the public record — not a rating of skill, not a recommendation, not legal advice.
License & registration
| Full name | John Joseph O'Brien |
|---|---|
| Bar / registration number | 59900 |
| License status | Active official status of record: “ACTV – Active” |
| Admission year | Not on record |
| Law school | Not on record |
| Business location | Denver, CO |
| Firm | Armstrong Teasdale LLP |
| Discipline standing | No disbarment or suspension is reflected in the current public status. Itemized disciplinary orders are not yet integrated for Colorado; see the official source for the full record. |
Federal court activity
Federal court activity has not been compiled for this attorney yet.
Source & last updated
Source: Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) — official attorney record. As of 2026-06-14 (last roster ingest).
Frequently asked questions
Is John Joseph O'Brien a licensed attorney in Colorado?
John Joseph O'Brien is registered with the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) under bar number 59900. The current public license status of record is "ACTV – Active" as of 2026-06-14.
Has John Joseph O'Brien been disbarred or suspended?
No disbarment or suspension is reflected in John Joseph O'Brien's current public license status of record per the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC).
What is John Joseph O'Brien's bar number?
John Joseph O'Brien's Colorado bar/registration number is 59900, assigned by the Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC). A bar number is the most reliable way to confirm you have the right attorney, especially for common names.
Where is John Joseph O'Brien's law office?
The Colorado Supreme Court — Office of Attorney Regulation Counsel (OARC) record lists a business location of Denver, CO and the firm Armstrong Teasdale LLP for John Joseph O'Brien. Phone and email are not published in the public roster.
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