Litigation, Asset Management, Family and Estate law OAB/SC 1.203 oswaldo@mh.adv.br


Oswaldo has been a prominent figure in the legal profession for over five decades. In 1969, he opened his first office in the heart of Florianópolis (SC), laying the foundation for the firm’s illustrious legacy. With his extensive legal expertise and astute insight, Oswaldo has gained recognition for his exceptional ability to resolve complex legal disputes, particularly those concerning family, estate, and state social security matters. Additionally, he has worked on high-profile cases in public and electoral law, further cementing his reputation as a fearless advocate. Oswaldo’s unwavering commitment to excellence has been instrumental in establishing Mosimann-Horn as a national leader in dispute resolution.


Bacharel of law, Universidade Federal de Santa Catarina – UFSC (1969).

Additional Activities

  • Senior Professor, Department of Legal Procedure and Forensic Practice at the Center of Legal Sciences – Universidade Federal de Santa Catarina – UFSC (1994-2005);
  • Senior Judge, Regional Electoral Court of Santa Catarina – TRE/SC (2000-2004);
  • Member of the Federal Board, Ordem dos Advogados do Brasil (1998-2000);
  • Member of the State Board, Ordem dos Advogados do Brasil – Santa Catarina (1987-1997 and 2001-2003);
  • Legal Consultant, Social Security Institute of Santa Catarina – IPESC (1970-1995);
  • Federal Attorney, Brazilian Assistance Legion Foundation – LBA (1976-1989);
  • Attorney, Eletrificação Rural de Santa Catarina S.A. – ERUSC (1975-1977);
  • Regional Attorney, Board of Trade of Santa Catarina State – JUCESC (1972-1975).


Litigation and Arbitration; Asset Management, Family and Estate Law.