Graduate employability is an important concern for contemporary universities. Alongside the development of employability skills, it is also crucial that students of bioscience, a "non-vocational" subject, have awareness of the breadth of potential careers that can follow from their initial degree. Over the past five years we have developed the Careers After Biological Science (CABS) programme. Former students are invited back to describe their current role and offer practical advice to undergraduates who may be considering moving into a similar discipline. The speakers' career profiles and associated resources are then collated onto an open-access website for the benefit of the wider community. This project is characterised by two principal innovations; the pivotal role of alumni in the delivery of careers education, and the integrated use of multiple social media (web2.0) technologies in both the organisation of careers events and development of an open access repository of careers profiles and associated resources. (Contains 1 figure.)