The American Council of Engineering Companies of Metropolitan Washington (ACEC/MW) is the local organization of the American Council of Engineering Companies (ACEC). ACEC/MW is the voice of Metropolitan Washingtons Engineering Community. ACEC/MW was founded in 1958 to serve the business needs of its professional member firms. Currently ACEC/MWs membership comprises over 100 firms with 4,100 employees. The Association encompasses the following geographic areas: Washington D.C., Montgomery, Prince Georges, Arlington, Fairfax Counties and City of Alexandria.