Premise: Sir Christopher Edward Wollaston MacKenzie Geidt {'1': ", '2': ", '3': ", '4': "} (born 17 August 1961) was the private secretary to Queen Elizabeth II from September 2007 to 2017. As of July 2016, Geidt also serves as the Chairman of the Council of King's College London, succeeding the Duke of Wellington.
Hypothesis: Sir Christopher served Queen Elizabeth for twenty years.