Board Thread:Skyrim/@comment-10150533-20130528203611/@comment-5917342-20130528210914

Finish 5 small jobs in a city and you'll get a special job from Delvin. Finish all the special jobs in Markarth, Solitude, Windhelm and Whiterun and you'll receive a ritual and become guild master. Special jobs are required. As for the small jobs, you can do jobs either for Vex or Delvin, or both.