Organizations and Conferences
Association for Death Education and Counseling
"The primary goal of ADEC is to enhance the ability of professionals to meet the needs of those with whom they work in death education and grief counseling." This organization focuses on training and education and they offer a certification in thanatology.
Cremation Association of North America
"CANA's mission is to serve as the leading authority on all aspects of cremation." This includes both flame based methods as well as alternatives like alkaline hydrolysis.
Death Salon
Different than a Death Cafe in the intended purpose and that instead of regular local meetups they have annual conferences. Their site is a bit out of date but they seem to still be active.