Count Dooku a.k.a. Darth Tyranus, was once a highly respected member of the Jedi Order, until, the death of his former student Qui Gon Jinn and his dissatisfaction with the corruption in the Republic, led him to join the Sith.
Under Darth Sidious' guidance Count Dooku formed the Confederacy of Independent Systems, or as they were better known as, the Seperatists. As a further part of Sidious' plot Count Dooku under his Sith alias hired bounty hunter, Jango Fett, to be the template for the Republic's Grand Army of Clone Soldiers.
Following his father's death, Boba was sent on a mission to find Count Dooku who held the information to Boba retrieving his father's fortune left to him.