Yes.  In fact, it’s a good idea to have an attorney to represent your interests – especially in an arbitration.  If you’re participating in a binding arbitration proceeding and mediation of your dispute has been unsuccessful, the arbitrator’s decision may be your one and only chance to prevail on your dispute because the standard for appealing an arbitrator’s decision is a high standard to meet.  You can appear in an arbitration proceeding pro se or without counsel, just like you could in Court.  But most people wouldn’t find it optimal to go to trial in Court without an attorney to present their case.  The same is true in an arbitration.  Having an attorney in mediation is also a good idea because they can help you understand your rights, the risks, and possible outcomes of your case or dispute.  They can also help you negotiate a good settlement and reduce it to writing.  They may even bring up things you might not think about on your own, like how your settlement might impact other agreements you might have with other parties, tax issues and the like.