An integral part of the HERMES project was a comprehensive training and outreach program, designed to engage a wide spectrum of audiences on issues and topics related to the deep-sea environment. Using the latest in Web-based technology alongside more conventional approaches, a series of initiatives and activities resulted in the development of resources aimed at school children, the general public, graduate students, the industrial sector, and policymakers. Innovative and engaging learning tools targeted at specific audiences have opened up the world of deep-sea research, providing essential information and facts in an easily digested format. HERMES has supported over 100 postgraduate students, either through direct financial support or provision of data. The project has also supplied hands-on training aboard research vessels, opportunities for young scientists to work at other partner institutions, and the valuable experience of working within a multi- and interdisciplinary project that aimed to address some of the biggest questions and threats to our deep-sea environment.