Family works in investment banking, brother has a stammer. Try not to focus on it. The less you give a shit about your stammer, the less your clients will. Your job will be connect the right people to each other and make the right decisions, a good RM will be well worth a stammer. You will have to make the extra effort to prove yourself to them though, its really a FULL full time job. Not telling you to not work on it, but dont excessively worry, as, if anything, stammering will worsen it.