(born 27 March 1953, Mandaguaçu, Paraná, Brazil) is the Archbishop-Metropolitan of the Ukrainian Catholic Archeparchy of São João Batista em Curitiba.
In May 2014, the Eparchy became an Archeparchy (Ukrainian-rite metropolitan archdiocese) with its own ecclesiastical province, with one newly erected Eparchy as its Suffragan See, and so Koubetch became its first Archeparch (Archbishop).