The goal of the Structural Fund Project Knowledge Portal is to support organizations and individuals involved in the SF project proposal development processes to achieve the highest possible number of high quality eligible project proposals meeting the stringent EC criteria. Interactions among experts playing different roles within a project definition case, are an important element of all Knowledge Services that include manual (i.e. expert) interventions. Therefore we present a typical expert interaction workflow exploiting the negotiating capabilities of the ICONS intelligent agent environment that will typically appear in a knowledge portal.