If reading and presenting a webinar is all you're asking for i can help you out for sure.
I have a wide range, in terms of vocal range, and speak english as my native language. my voice naturally is within the lower range but i can change the pitch with no problem to a lower or higher pitch, whatever is desired. I've been told by others in the vocal and reading industry that my articulation is very good as well. My voice isn't monotone nor is it over dynamic so your clients won't get bored or annoyed by it
if we talk more about your project i'm sure we can come to a conclusion on how to go about this project exactly how you want and make sure the outcome satisfies your needs for this project