MG
Mary Anne Guinan
Mary Anne Guinan is a lawyer who works for Guinan Law Firm. Practice areas include Oil, Gas and Energy Resources. Court admissions include Texas Southern District Court. Licensed in Texas since 1999. Graduated from South Texas College of Law in 1999.
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Law school
Bar admission
Office
Disciplinary
MG
Mary Anne Guinan
Guinan Law Firm26 years licensed
Claim profileContact attorney
Mary Anne Guinan is a lawyer who works for Guinan Law Firm. Practice areas include Oil, Gas and Energy Resources. Court admissions include Texas Southern District Court. Licensed in Texas since 1999. Graduated from South Texas College of Law in 1999.
Law school
South Texas College of Law
Class of 1999
Bar admission
1999
State Bar of TX · No. 24012750
Office
—
Disciplinary
None on record
Clean since admission
Career history
2 observed firms
Based on State Bar of Texas snapshots — each row is a firm the attorney was registered with at one of our quarterly pulls.
- Director, Commercialization and ContractAS OF MAY 2023Other Law-Related Employment · Houston, TX
- Guinan Law FirmAPR 2026 — PRESENTOther Law-Related Employment
Case data
Case data
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Practice & jurisdiction
Practice areas
- Oil, Gas and Energy Resources
Courts admitted
- Texas Southern District Court
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Last refreshed Jun 2026