NEC's headquarters is conveniently located in Rockville, Maryland, near utility and nuclear regulatory agencies, industry corporate offices and Washington, DC.

NEC is also fully prepared and capable of working effectively with clients and organizations located worldwide. As needed, NEC has operated offices in the areas of Houston, Texas; Atlanta, Georgia; Oswego and Long Island, New York; Milwaukee, Wisconsin; Chicago, Illinois; San Francisco and Sacramento, California; Raleigh and Ocracoke, North Carolina; Huntsville, Alabama; Pennsylvania, New Jersey; and Boston, Massachusetts. Site specific offices have been located at various locations near nuclear power plants across the United States.