They’re you’ll find the Riften Face-Sculptor, Galathil.

You won’t miss it, and you will probably have heard every guard direct you there as part of idle chatter. If you want to change things up the other way and you have Dawnguard all you need to do is head down to the Ragged Flagon tavern in Riften’s sewers. Galathil really doesn’t want to be dealing with you ina thief infested sewer.