MJ
Mark Janssen
43 years licensed
Mark Janssen is a lawyer. Practice areas include Criminal. Court admissions include Texas Western Bankruptcy Court. Licensed in Texas since 1982. Graduated from Texas Tech University in 1982.
Claim profileContact attorney
Law school
Bar admission
Office
Disciplinary
MJ
Mark Janssen
43 years licensed
Claim profileContact attorney
Mark Janssen is a lawyer. Practice areas include Criminal. Court admissions include Texas Western Bankruptcy Court. Licensed in Texas since 1982. Graduated from Texas Tech University in 1982.
Law school
Texas Tech University
Class of 1982
Bar admission
1982
State Bar of TX · No. 10571950
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.
- Unknown firmAS OF MAY 2023Private Law Practice · San Marcos, TX
- Unknown firmAPR 2026 — PRESENTPrivate Law Practice
Case data
Case data
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Practice & jurisdiction
Practice areas
- Criminal
Courts admitted
- Texas Western Bankruptcy Court
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Last refreshed Jun 2026