Barristers, Commissioners and Lord Chief Justices are all positions in the law career. Each nation has its own law system, and those that are charged with upholding it have a huge responsibility.
The Commissioners of the Secret Service are the dark horses of the game. They play their games of deception in the shadows and will attempt to subvert others to their cause. The Secret Service has unique powers to defend their nation and provide information to its leaders, but it is not hard to see how these powers could also be used for political purposes.