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Membership Events Education Safety Political media screen and minwidth 1000px. csse9k13hdisplaynoneAdvocacy Members Only With over 650 Member FirmsWE ARE the Face of Construction in Baltimore Need Trainings Expand Your Network Save Money Join ABC WE ARE ABC Baltimore WHO WE ARE Associated Builders and Contractors of Greater Baltimore is the largest organization in Maryland to represent the commercial construction industry. Our 650 members represent the leading general contractors and specialty contractors in the region. OUR MISSION ABC helps its members develop people win work and deliver that work safely ethically and profitably for the betterment of the communities in which ABC and its members work.