# MARK ROBERT O'SIOCHAIN

> Public directory record. License status is unknown; check the original sources before relying on a credential. Office location is not proof of admission.

[Canonical profile](<https://instalawhq.com/lawyers/mark-robert-o-siochain-ny-4391439>) | [JSON record](<https://instalawhq.com/api/v1/lawyers/mark-robert-o-siochain-ny-4391439>)

- Record ID: ny-4391439
- Updated: 2026-10-08T22:58:40.852739+00:00
- Data status: registry\_imported
- License status: unknown
- Claimed profile: No
- Title: Attorney
- Office: OMAHA, Nebraska
- Firm: Not provided
- Registry-reported employer: GUINAN O SIOCHAIN LAW GROUP (current affiliation not verified); [source](<https://data.ny.gov/resource/eqw2-r5nb.json?registration_number=4391439>), observed 2026-10-07T23:27:40.736Z
- Practice areas: Not provided
- Languages: Not provided
- Years of experience: Not provided
- Free consultation: Not provided
- Virtual appointments: Not provided
- Accepting inquiries through this site: No
- Reported hourly fee: Not provided
- Rating: Not provided; review count: 0

## About

MARK ROBERT O'SIOCHAIN appears in New York attorney registration records with an office city of OMAHA, NE.

## Approach

Not provided

## Education

Not provided

## Registry observations

Source-reported statuses below are observations, not independent confirmation of an active license.

- NY; registration 4391439; reported status: Currently registered; observed 2026-10-07T23:27:40.736Z; [source](<https://data.ny.gov/resource/eqw2-r5nb.json?registration_number=4391439>).

## Sources

- [Registry source](<https://data.ny.gov/resource/eqw2-r5nb.json?registration_number=4391439>); observed 2026-10-07T23:27:40.736Z.
- [Registry source](<https://data.ny.gov/resource/eqw2-r5nb.json?registration_number=4391439>); observed 2026-10-07T23:27:40.736Z.

## Contact



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