IETS is going to Thailand!
Passport and Visa Information
You will find a summary of countries and territories entitled for Visa Exemption and Visa on Arrival to Thailand Here
Please check with your embassy for visas for entering in to Thailand. You may need to apply for a working visa for attending the meeting. Information for the Thailand Embassy in the United States can be found at: http://thaiembdc.org/consular-services/non-immigrant-visas/