Change affects the whole organisation. That makes it difficult to direct objectively from within. You know the politics and the sensitivities. But that also makes you blind to how the message comes across to someone hearing it for the first time.
An external agency brings distance and experience. It asks the questions nobody dares to ask internally. About clarity, honesty and room for emotion. The agency also takes full direction: script, programme, venue, technology and coordination on the day itself.
You can read more about the approach in our article on organising change communication events.