AttorneyDana Marie Gannon● 35 total views
DG

Dana Marie Gannon

Thornton, Biechlin, Segrato, Reynolds & Guerra, LC·San Antonio, TX·36 years licensed

Dana Marie Gannon is a lawyer in San Antonio, TX who works for Thornton, Biechlin, Segrato, Reynolds & Guerra, LC. Practice areas include Insurance, Workers' Compensation. Board certifications include Workers' Compensation Law. Licensed in Texas since 1989. Graduated from Drake University in 1989.

Claim profileContact attorney
Law school
Class of 1989
Bar admission
1989
State Bar of TX · No. 7623800
Office
100 NE Loop 410 Ste 500
San Antonio, TX 78216
Disciplinary
None on record
Clean since admission
DG
San Antonio, TX·36 years licensed
Claim profileContact attorney

Dana Marie Gannon is a lawyer in San Antonio, TX who works for Thornton, Biechlin, Segrato, Reynolds & Guerra, LC. Practice areas include Insurance, Workers' Compensation. Board certifications include Workers' Compensation Law. Licensed in Texas since 1989. Graduated from Drake University in 1989.

Law school
Drake University
Class of 1989
Bar admission
1989
State Bar of TX · No. 7623800
Office
100 NE Loop 410 Ste 500
San Antonio, TX 78216
Disciplinary
None on record
Clean since admission
Career history

3 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.

  1. Thornton, Biechlin, Segrato, Reynolds &AS OF MAY 2023
    Private Law Practice · W Lake Hills, TX
  2. Thornton, Biechlin, Segrato, Reynolds &AS OF APR 2026
    Private Law Practice · San Antonio, TX
  3. Thornton, Biechlin, Segrato, Reynolds & Guerra, LCAS OF JUN 2026
    Private Law Practice · San Antonio, TX
Case data

Case data

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Practice & jurisdiction
Practice areas
  • Insurance
  • Workers' Compensation
Courts admitted
  • Fifth Circuit Court of Appeals
  • Texas Eastern District Court
  • Texas Northern District Court
  • Texas Southern District/Bankruptcy Court
  • US Supreme Court
Credentials
Board certification
Workers' Compensation Law
TBLS · Certified 2004
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Last refreshed Jun 2026