In recent years the commitment to disseminate the geological knowledge, making it available for citizens and decision-makers, has been recognized as a precise ethical duty of the geologist. However the fulfilment of the duty to disseminate the geoscience knowledge requires good communication skills that should be adequately trained, since often the university studies don’t include such training. A specific research has been carried out to explore the possibility to develop a short training course capable of improving the expressive and communication abilities of professionals. A set of exercises has been also expressly developed to improve the metacognitive skills of the participants (metacognition is the knowledge and regulation of one’s cognitive activities in learning processes). The course has been delivered to professionals belonging to the Professional Association of Engineers (FOIT) in Turin, Italy, and has been able to significantly improve their expressive and communication abilities, increasing their interest and willingness to divulge their knowledge, recovering their confidence to succeed in this task and helping them to become more effective communicators. The contents of the course are now available, upon request, for anyone interested in teaching it elsewhere and/or improving its contents. Providing both professional and research geologists with means to renew their interest and ability to communicate can be a useful contribution to raise their (geo)ethical conscience and to help them to more easily carry out their ethical commitment.