I'm a roadside technician dispatcher: in simpler terms, if your car breaks down along the way, you call us and we send you a technician to have it fixed on the spot or a tow truck if towing to a garage is required. I receive on average 25 phone calls a day from stranded motorists and I make around the same amount of calls to mechanics, dealership employees, or 3rd party towing provides. I occasionally stutter on some words, especially when people call me panicking after an accident, but I don't care and neither do they as long as I do my job efficiently. Very often customers congratulate me for my kindness and my team leader is also happy with my performance. It may seem ironic or even contradictory for someone with a speech impediment to work a job where your only communication channel is your voice, your perceived weak point; yet, as one of the first comments I read in this thread states, you must never let your stutter dictate what you can or can't do. From a practical point of view I found that rehearsing sentences and following a call structure - I actually made a scheme to adhere to, since most calls are similar - helps greatly in reducing blocks and repetitions. Similarly (and fairly obviously), being confident with the procedures helps, so I always read the documentation whenever I have a spare moment to make sure I have as fewer knowledge gaps as possible.