Chris was the first person who came to mind.

Hello Karin, Teaching pronunciation is a subspecialty within teaching a language. On italki, a teacher search with filter “phonology” will show a small number of teachers with training in articulatory phonetics and English phonology. You are welcome to review my profile and then contact me directly if interested. Regards, Chris

Hello Terry, Thank you for your answer. I have contacted Chris. Hope to take lessons with him.