! I think you got Nevada sunstroke. He looks more like Hugo Weaving:http://www.moviewatchlist.com/cast_gallery/images/Hugo%20Weaving%20(8).jpg Kiefer Sutherland is a famous actor known for his roles in movies and TV shows such as "24" and "A Few Good Men". In Fallout New Vegas, he provided the voice for the character of J.E. Sawyer, who is a developer at Obsidian Entertainment.
Kiefer Sutherland was approached by Obsidian Entertainment to provide the voice for the character of J.E. Sawyer. He was a fan of the Fallout series and was excited to be a part of the game.
J.E. Sawyer's character is not a major character in the game, but he does play a role in the storyline. He can be found in the Mojave Outpost and gives the player various quests and information.
In addition to Fallout New Vegas, Kiefer Sutherland has also provided the voice for characters in other video games such as Metal Gear Solid V: The Phantom Pain and Call of Duty: World at War.
No, J.E. Sawyer's character is not based on a real person. He is a fictional character created specifically for the game by the developers at Obsidian Entertainment.