César A. Sierra B.
Associate | Litigation & Conflict Management / Corporate & Business Law
Career
César knows Mazara's legal practice from the ground up. That progression informs the way he practices today.
He joined the firm in February 2022 as a Paralegal. That same year, he was promoted to Legal Coordinator; in 2024, he became a Junior Lawyer, and in August 2026, he was promoted to Associate.
His practice covers civil law, civil procedure, family law, administrative law, real estate law, labor law and corporate and business matters. He has participated in asset-related disputes, debt recovery, civil liability, registered property rights and family conflicts, combining litigation with negotiation and alternative dispute resolution.
Practice areas
Civil Law | Civil Procedure | Family Law | Administrative Law | Real Estate Law | Labor Law | Corporate & Business Law | Alternative Dispute Resolution
Sectors & industries
Insurance | Tourism | Hydrocarbons | Real Estate | Ground Transportation | Wholesale Trade
Representative experience
Representing tourism and construction companies in debt recovery matters totaling approximately USD 40 million.
Participating in financial liability matters.
Negotiating settlements in civil liability disputes connected with the insurance sector.
Participating in claims for economic entitlements and collection proceedings against state entities.
Leading internal initiatives to improve the recording, monitoring and control of the firm's matters.
Education
Law degree — Universidad Católica Santo Domingo (UCSD).
Master's degree in Civil Procedure Law — PUCMM, in progress.
Languages
Spanish — Native | English — Intermediate
Memberships
Colegio de Abogados de la República Dominicana.
Social impact, pro bono & volunteering
He participates in Mazara Abogados' reforestation initiatives and the LEX-UNIBE Legal Assistance Fair.
Awards & recognition
Second runner-up for the Mazara Abogados Excellence Award — 2024 and 2025.
Personal
He enjoys nature, mountains, music, art and good conversations. A fan of jazz, blues, classical music, rock and country, he finds personal expression in playing guitar and creating music.
