[bluefirebrand]

I hate to say it but it might negatively impact your career. I hope it doesn't, but it might

People in charge of promotions often have more than one choice for a given promotion and they will use any criteria they can to weigh for or against you

A speech impediment is more likely to weigh against you than for you, unfortunately

That's the sort of thing that anti discrimination laws and guidelines are supposed to remedy but I suspect they mostly don't actually fix

Personally, if speech therapy is an option I think I would try it? It can't hurt you any

I'm going deaf, and looking into fixes for that. I don't think you should be ashamed of your speech impediment, but I also don't think you should be ashamed for looking into help fixing your impediment either

[Nevermark]

This is good advice.

Their is also an effect that I have seen many times and experienced myself. Where it’s evident that someone has an idiosyncratic challenge, but you can tell they have put effort into overcoming or mitigating it. And they just work through it, not letting it get in their way.

It demonstrates life competence, and is a real positive.

Whatever you do, whatever you can do, don’t let “it” get in your way.

[RugnirViking]

Absolutely, this. I see this all the time with colleagues that don't speak English too well (I'm not in an English speaking country, but development offices often use English)

I'm not talking about people who can't express themselves or can't understand, merely that they haven't mastered it - use clumsy wording, or have a thick accent. These are often some of the most technically capable and talented people I've worked with, but also typically are not perceived as such by others, and im ashamed to say, working together with them would often result on the credit being placed unduly on myself.