I'm trying to complete a major Thieves' Guild quest, which requires me to gain a certain level of influence in each area. This appears to be done by accepting and completing minor quests, or "jobs", from the other Thieves' Guild members. I've been able to achieve these objectives for all areas except Markarth. In all this time though, I've only gotten one job in Markarth.
Is there something else I should be doing to gain influence there, or some way to steer the available jobs to Markarth, so that I can complete this quest?