Simplify the following text for a Grade 10 native English-speaking person.
Original: Until April 2005 , the DCI also served as de-facto Director of the Central Intelligence Agency and was often referred to colloquially as the `` CIA Director . ''
Simplified: Until April 2005 , the DCI also served as the de-facto director of the CIA , and he was often referred to colloquially as the `` CIA Director . ''