Everitt is Principal Investigator of the Gravity Probe B mission mainly aimed to test frame-dragging at an expected accuracy of 1%. According to general relativity, it is an effect induced by the rotation of the Earth on orbiting gyroscopes. Everitt spent more than 40 years on the project and was awarded with the NASA Distinguished Public Service Medal. The results were published in Physical Review Letters in May 2011. The results confirm general relativity's predictions, though not to the project's ambitious goal of 1% precision.
As of November 2013, according to the NASA ADS database, the h-index of C.W.F. Everitt is 18, with a total number of citations (self-citations excluded) of about 900. The tori index and the riq index are 12.1 and 62, respectively.