Marcello Maciel Mancilha graduated in Law from Universidade Federal Fluminense (UFF) and worked as a lawyer for four years in the labor, constitutional and social security areas. He joined the magistracy as a substitute labor judge at the Regional Labor Court of the 17th Region (ES) in 1992. Two years later, he was promoted to head judge of the Labor Court of Mimoso do Sul. Victory Work. He took office as judge in 2012 and chaired the TRT in the 2013-2015 biennium. He is an undergraduate and graduate professor at the Faculty of Law of Vitória (FDV) in the area of Labor Law. He has also taught at the Vila Velha University Center (UVV) and at Faculdade Santa Úrsula. Mancilha was already part of the triple list for the vacancy of minister in the Superior Labor Court.