About
O’Hanlon, Demerath & Castillo is a Texas law firm based in San Antonio, founded in 2000 and serving clients statewide from offices in Austin, the Rio Grande Valley (Pharr), Fort Worth, and San Antonio. The firm represents public entities, educational institutions, and private clients across a wide range of matters, including school law and public finance; representation of municipal and economic development corporations; construction and first-party insurance litigation; higher education; personal injury and contingent fee matters; labor and employment; constitutional law; legislative advocacy; open government; economic development; public policy litigation; and real estate planning. The firm also assists school districts with social media litigation and conducts executive searches.
Clients engage the firm for counsel, transactions, and litigation with an emphasis on regulatory compliance and the needs of public-sector organizations. Its attorneys work across Texas jurisdictions to provide coordinated service to boards, administrators, and businesses seeking practical legal solutions.