What to expect from IOD
In 2010, agencies from the UN were the joint largest recruiter of LSE graduates. However, it is difficult to be recruited into the professional-level entry programmes of the international organisations directly from university. The majority of these employers expect candidates to have a minimum of a PhD or a Master's degree with several years of relevant experience.
Therefore, rather than see this as a recruitment event, you should treat IOD as an opportunity to find out more about these organisations' hiring expectations and processes and how to develop your skills and experience appropriately, or to decide if this type of role is what you want to pursue.