The AGA believes the appointment will benefit the gaming industry, as online gaming and sports betting continue to develop in the US.
GeoComply produces secure geo-location services and supports regulated online casino, poker, sports betting, lottery and DFS operators in 42 US states.
Sainsbury said: "With the rapid and seismic changes in the industry over the last year, we felt it was important to become a member of the AGA now and support their work to drive understanding of regulated gaming across the US."
Stacy Papadopoulos, AGA Senior Vice President of Industry Services, said: "We are pleased to have GeoComply join the AGA as a core member and welcome Anna to our board.
"Suppliers like GeoComply serve an important role in the gaming ecosystem and having them active in the AGA benefits our members and the industry as a whole."
