This book delivers essential skills in "spoken" professional communications, presenting theoretical and applied frameworks for business talk using English as a lingua franca. Adopting a role-playing approach mimicking various professional settings, it assesses the strength of the well-reasoned argument, the logical links that convince the audience of the coherence of the speaker's argument and the necessary linguistics competencies. This book centers on a variety of situations that commonly take place in business organizations (such as relational talk; call center talk; job application talk) and addresses key skills such as conflict resolution and collaborative problem solving through communication, which are key for both students and practitioners. In addition it analyses spoken business discourse data with the four main sources of communicative competence: grammatical competence, discourse competence, sociolinguistic competence and strategic competence in order to highlight how they are used in business speaking practices.