Since its foundation, Mosimann-Horn has practiced, strongly, on complex cases of national importance under electoral law.


Hélio Mosimann served as vice-president, chief judge and president of the Electoral Tribunal of Santa Catarina in the period of 1989-1990. Oswaldo Horn served as a judge at the Electoral Tribunal of Santa Catarina from 2000 to 2004. Rafael Horn, on his turn, served as a judge of the Electoral Tribunal of Santa Catarina from 2009 to 2011.

The firm understand the complexities of this field of practice and work seamlessly to offer the clients comprehensive, well-reasoned counseling and dispute resolution on a wide array of subjects under Electoral Law, including: electoral propaganda, abuse of economic or political power, mayoral transition, elective terms, and financing for the campaigns.