AEC may refer to:
AEC (Alashki Engineering Constructions)
AEC (Alashki Engineering Constructions, in Bulgarian: АЕС, formerly Engproject Ltd.) is a Bulgarian structural and civil engineering company, located in Sofia, Bulgaria. It was founded in 1996 by Dr. Ilia Alashki. Main activities of the company are engineering of reinforced concrete structures, steel and wooden structures, hydraulic structures, deep excavations and special foundations.
init. 1 United States ''Atomic Energy Commission'' 2 ''Australian Electoral Commission'' 3 ''Associated Equipment Company'' 4 ''architecture, engineering and construction''