The American Association of Engineering Societies (AAES) is a former umbrella organization of engineering societies in the US, founded by a group of 43 societies in 1979.[1] After several disputes,[1] and a change in focus in the mid-1980s from speaking for the societies to coordinating between the societies,[2] its membership was reduced to 22 societies by 1993,[1] and 17 societies as of 2015[update].[3] The AAES dissolved in 2020.[4][5]