I have worked with a LOT of consultants where presentations and client conversations are part of life, here is what I've gleaned... 1. Practicing. Nearly everyone reports that they feel more comfortable and confident if they are well-prepared for their presentation (I think this extends to non-stutterers, too). 2. Disclosing your stutter. People talk about that on this subreddit a lot, and it's because it really is the #1 thing you can do to alleviate tension and kick that "what if I stutter / I have to not stutter" fear to the curb. If you're talking to a client, just a quick, "I stutter, let me know if you need me to repeat something. So here's how X technology works..." 3. Focus on the other person / be a good listener. If all you are focusing on is stuttering (or trying not to stutter), you are going to do a crap job of listening to the client or paying attention to if the audience is following along with your information. Make it about them, not about you. Finally, my impression seems to be in consulting that skilled, intelligent people have no trouble being successful and getting promoted. Usually, stuttering is a much bigger deal to the person who stutters than to the employer or clients, and you are much more likely to hold yourself back than to have negative external reactions (though there are jerks everywhere, so it's not impossible-- the likelihood is low, though).