Here is a list of the professional speech pathology associations from around the world with websites in English. Just click on the light blue link to visit the official site. If you plan to work or volunteer in these countries then it is worth looking through their websites and perhaps contacting the associations directly.
United States of America: American Speech, Language and Hearing Association (ASHA)
Trinidad & Tobago: Speech-Language and Audiology Association of Trinidad and Tobago (SLAATT)
Australia: Speech Pathology Australia (SPA)
Saudi Arabia: Saudi Society of Speech-Language Pathology and Audiology