JD
John Brian Diefenbach
John Brian Diefenbach is a lawyer in Dallas, TX who works for Diefenbach Group, PLLC. Practice areas include Business, Construction, Entertainment. Court admissions include Texas Northern District Court. Licensed in Texas since 2019. Graduated from Gonzaga University in 2004.
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Law school
Bar admission
Office
Disciplinary
JD
John Brian Diefenbach
Diefenbach Group, PLLCDallas, TX·6 years licensed
Claim profileContact attorney
John Brian Diefenbach is a lawyer in Dallas, TX who works for Diefenbach Group, PLLC. Practice areas include Business, Construction, Entertainment. Court admissions include Texas Northern District Court. Licensed in Texas since 2019. Graduated from Gonzaga University in 2004.
Law school
Gonzaga University
Class of 2004
Bar admission
2019
State Bar of TX · No. 24117185
Office
539 W. Commerce St., Suite 205
Dallas, TX 75208
Disciplinary
None on record
Clean since admission
Case data
Case data
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Practice & jurisdiction
Practice areas
- Business
- Construction
- Entertainment
- Litigation: Commercial
- Military
Courts admitted
- Texas Northern District Court
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Last refreshed Jun 2026