Simplify the following text for a Grade 9 native English-speaking person.
Original: Jeffrey Preston `` Jeff '' Bezos ( born January 12 , 1964 ) is the founder , president , chief executive officer and chairman of the board of Amazon.com .
Simplified: Jeffrey Preston `` Jeff '' Bezos ( born January 12 , 1964 ) is the founder of Amazon.com . He is also the chairman , president , and Chief Executive Officer ( CEO ) of Amazon.com .