ombudsman [ombudsmen](official who investigates complaints) noun [UK: ˈɒm.bʊdz.mæn] [US: ˈɑːm.bədz.mən]
mediadornoun {m}
mediator [mediators](one who negotiates between parties seeking mutual agreement) noun [UK: ˈmiː.dɪeɪ.tə(r)] [US: ˈmiː.di.ˌe.tər]A good mediator can make a deal go smoothly. = Un buen mediador puede llegar a un acuerdo sin problemas.