39 year old male here. Persistent stutter since I was 7. The most impactful thing I ever did for myself was to start telling people exactly what was going on. I didn't do it until college, but I would get in front of the class (yep, on purpose) and say something basic like, "Hey, I'm Steve." and I would totally stutter on my name and continue, "what you just heard there is a stutter. I can't help it, so you'll hear me have trouble speaking sometimes. I'd rather just let you all know now." Yes I was an absolute wreck while doing it but it got easier and easier each time because you know what I felt next time I came into that class? Nothing. No heavy chest, no worry about hiding something. Because I wasn't hiding anymore. I was able to just be myself. Tell your co-workers. Try to do it in person. It can be so tempting to do a memo or something like that, but they need to hear you. People react negatively to a stutter because they're confused, so tell them exactly what is going on. It's a short moment of incredible discomfort that is infinitely worth it.