Impish, having been a member of the IMC previously myself I would suggest it would be a waste of time and effort to take their diploma. This diploma is not recognized as anything by actual Management Consultancies and is used essentially by the IMC as a route to their CMC which is a joke in itself, since this is not academically rigorous, has no adequate pre-requisite threshold, and is basically a sop for formally-unqualified IMC senior members to obtain a designation in leiu of proper qualifications, rather as the IOD is doing with the designation ChD in doling it out to unqualified senior members. The IMC seems to be swiftly becoming absorbed into the Chartered Management Institute anyway and probably will cease to exist separately in due course, Its diploma and the CMC will thus become a relic.As recommended here already, if you have a PhD add the necessary experience. That is all you will need.