After nearly two decades of knowledge preservation activity, relatively little work has explored the organizational use of Concept Maps elicited from experts. This paper describes an attempt to get back to the roots of Concept Mapping as a means of both representing and evaluating knowledge, in the context of professional work. It describes a pilot project in which the authors used Concept Mapping to elicit and represent knowledge from domain experts, then demonstrated the use of Concept Maps for assessing the mental models of other professionals. The authors introduce Sero! – a prototype Concept Map-based learning assessment platform, and a general model for the organizational use of Concept Mapping and Concept Maps.