ACEC today is the largest national organization of engineers engaged in the practice of consulting engineering. It is comprised of 51 state and regional Member Organizations, representing more than 5,800 independent engineering firms throughout the United States. These firms employ more than 300,000 engineers, architects, land surveyors, scientists, technicians, or other professionals, who design some $100 billion of private and public works annually. Consulting engineering firms join ACEC through their Member Organizations.