It never hurts to set up an initial conversation or interview. Many T's will do a free initial consult at least over the phone.
I have found competant T's in nearly all fields of study and degree types. I've found personality matters to me way more than education, however equal to personality would be competance in treating my issues. Having a trauma history, I select T's that have experience and training in handling trauma and PTSD. I personally like a more flexable approach to working with clients as each client is different. I've found that at all levels of education however.
Good luck in your search