Most Information and Bio picture are from Xbox360Achievements.org and its posters xRogue 5x and Fizzmatix. Original thread can be found at this location.
The Maestro is a Most Wanted Ghost in the online multiplayer mode of Ghostbusters: The Video Game. He is a variation of the Cook Ghost or possibly the Construction Worker Ghost as he is an Animator Ghost. He can be fought by capturing Sharpshooter Bailey and completing ten Survival jobs in the Museum levels. He only appears in the Museum levels.