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Catherine Syllaios Callahan
Catherine Syllaios Callahan is a lawyer in Dallas, TX who works for Vinson & Elkins LLP. Licensed in Texas since 2006. Graduated from Stanford University in 2004.
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Catherine Syllaios Callahan
Vinson & Elkins LLPDallas, TX·20 years licensed
Claim profileContact attorney
Catherine Syllaios Callahan is a lawyer in Dallas, TX who works for Vinson & Elkins LLP. Licensed in Texas since 2006. Graduated from Stanford University in 2004.
Law school
Stanford University
Class of 2004
Bar admission
2006
State Bar of TX · No. 24053500
Office
2001 Ross Avenue, Suite 3900
Dallas, TX 75201
Disciplinary
None on record
Clean since admission
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Last refreshed Jun 2026