As a public servant, it's my job to serve the needs of the people.
Hart is the Deputy Mayor of Midgar under Mayor Domino. He can be found standing outside of the Mayor's office on the 62nd floor of the Shinra Headquarters. Hart is able to assist the player when they are trying to figure out the Mayor's password to get the keycards for higher floors; the more he is paid, the more help he will give. If the player will pay him enough, he will actually just tell the password.